Distributing the land in inheritance when one heir built a structure on it

Q: I built on my mother's property with her permission, my sibling doesn't want to compensate me for the improvements. She say that I occupied it for free for many years. 

My Mother is late. I have one sibling (sister) we and are heirs to the property. 

What is the Islamic ruling on this? Does she have a claim on the building that I erected with my funds and the proceeds that come from it or does she have a claim only for the land that the building was erected on?

Performing salaah on a plane while sitting

Q: A person read salaah on the plane. Due to severe turbulence and short time for asr and the flight crew not allowing him to stand, the asr Salaah was read sitting on the seat not facing qiblah. 

I understand that one will have to repeat this salaah standing up afterwards. The time of asr ended and maghrib time came in. The flight now landed. 

1. Will the Asr Salaah be regarded as invalid and Qadha have to be read (fardh not done at all), or was it a valid adaa but necessary (waajib) to repeat the salah? 

2. If one is saahib e tarteeb and the next salaah comes (e.g. maghrib comes in), will one read the next salaah (maghrib) first, or repeat the salah in question (asr) first? 

3. If someone in the family did not have wudhu, and neither had anything to make tayammum with, then performed the Asr Salaah sitting on the seat in that state, will the masla change in both questions 1 and 2?

Being entitled to a refund if one receives a different kurta from the one ordered

Q: I purchased a kurta from a family member, the kurta I ordered was from seeing a picture which they sent to me, upon receiving the kurta I noticed the studs are completely different from what was ordered. 

I brought it to their attention, sent it back and awaited feedback. I was told that what I initially ordered was old stock and what they gave me is now the new range [I was not informed before about this] nor did they mention that picture is for illustration purposes only. 

I asked for a refund as I'm not happy with that product. They are now saying they don't do refunds and I should pick something else. All this was not told to me when dealing and payment was made. I've made it clear that I don't require anything else and a refund is the way forward. 

According to them they don't see any fault or difference in what they gave me as BRAND and COLOR of kurta is same.. the only difference is the studs on the kurta (which is the whole point). Now I'm being told that since I'm DEMANDING a refund they would minus a percentage of what I paid to them as a service fee, again I was not informed about all these things prior to the transaction\deal. 

They are justifying all this by saying that since I am family they didn't charge me delivery fee which they paid to THEIR SUPPLIER (for them to get their stock, not for it to be delivered to me). According to them they have full right to claim this delivery fee from me and I am in the wrong. 

Please advise

Sound system malfunctioning during the fardh salaah

Q: Some people were reading salah in the main hall and others outside the hall. The microphone got cut half way through, such that the people outside the hall couldn't hear the imaam or see him. There was also no one to call out the takbeer. What is the ruling in this case? 

1. Is the salaah valid for those outside despite the mic being off throughout the rest of the salaah? 

2. Some people broke their salaah and some carried on. Is their salaah valid? 

3. If the mic was to start working again, then can the people outside carry on and catch up to the imaam?

Redeeming points from a bank and giving it in charity

Q: My question is regarding Standard Bank U Courts. 

I do have points currently which I am not using as I believe that its haraam. 

Can I redeem the points by purchasing items from their stipulated stores and give it away in charity to my non Muslim helper or to an old age home or orphanage. If this is possible, does it have to be to a non Muslim old age home or orphanage? 

I also have the intention to cancel the U count