Receiving extra money from the company one worked for

Q: This incident happened 10 years back.

I worked for an American company in UAE. While travelling in UAE, I billed the company for my travel expenses (as per the company policy) the bill was for 20,000 Dirhams but they transferred USD 20,000 in my account. I contacted the finance person and asked him to send the correct amount and withdraw the wrong amount. He did that, however, few days later, another USD 20,000 was deposited in my account. I contacted the bank this time but they told me it’s the correct amount as per the transfer. So I didn't do anything for 5 years. Few years back (feeling uneasy) I contacted the company again to see if they wanted their money back but I didn’t get a response. What should I do since I have already used this money? I have been giving out sadaqah with the intention of paying back this amount. Is this correct?

Meaning of "istiwaa"

Q: Is it mentioned in the Quran that Allah is above seven heavens? I know that Quran states that Allah has istiwa on Arsh but is it specifically mentioned that he is above the seven heavens?

Also when we say He is above the seven heavens does it actually mean that he has Istiwa on Arsh? Also is it permissible to say that He is above seven heavens?

Husband keeping children away from his father

Q: My question is pertaining to relationship of my children with their grand father (husbands father).

My in laws are divorced now for a very lone time. With the result that there is no communication between my husband and father in law at all. Since being married and having kids now I would like my children to have a relationship with their grand father (Dada) as my father (Nana) is late. I have posed the question to my husband regarding this and he said that his father is aware of his grandchildren but has not made contact. But my feeling is that his father has not made any contact because father and son are not on talking terms and as result he has kept his distance.

Should I leave it and not pursue this any further or shall I try and make contact with my father in law even though he does not know me. What is the correct action to be done here. Please advise.

Charging the client for the delivery note

Q: Zaid (a wholesaler) sold goods on credit to the value of R100 000 to Amr (a retailer) on 15 January 2018. The goods were delivered on the same day and the customer’s copy of the delivery note was signed by Amr and given to him for his records with the goods that were delivered to him on the same day. On 26 February 2018 the amount owed for the goods was still outstanding and Amr realised that his goods receiving clerk misplaced the delivery note that was given with the goods. Amr was very concerned that his auditors will insist on inspecting the copy of the delivery note so he quickly contacted Zaid and requested a copy of the delivery note that the supplier normally keeps. Zaid informed Amr that his company’s policy is to charge R100 for this request as it requires the time of his admin clerk who has to leave whatever work he is doing and now attend to searching through the company records, locating that particular delivery note, then scanning it and emailing it. Amr is very happy to pay the R100 fee so long as he gets a copy of the delivery note.

Is it permissible for Zaid to charge Amr this agreed upon fee for the copy of the delivery note?