Paying interest due to late payment

Q: My question is regarding my university tution. I have paid the first semester fee which was 4000 euros, and events occurred just before the second semester began which led me to consider my place at the university institute I was in. I therefore spent the first few weeks of the second semester pondering over what to do next, before eventually deciding on staying. During that time, the deadline for second semester payments had passed and the university began charging late fees, and I was aware that this would be the case before the deadline; however I wasn't aware until after the deadline had passed that the charging of late fees was equivalent of riba. I will try and speak with someone at the university to Insha Allah reduce the fees to a normal price, but if  after speaking with an individual at the university and being refused my request, I paid the late fee, would I be sinful for doing so?

Repenting from listening to peoples conversations

Q: I have done some sins that are in regard to the creation, mostly listening to peoples conversations while having bad thoughts by accident. There is no way that I can find all these people because of the way it happened. Will I be getting cursed while reading the Quran even after making tawbah as of now? (I have intention to do something about finding these people) Can you also tell me the best course of action when people start talking around you?

Ma'zoor due to urine drops

Q: I have asked many times these questions regarding a mazoor with incontinence of urine, but my problems are getting worse. It is very difficult for me to wash my private part and clothes for every Salaah. I don't want to leave my prayer. Can I only make wudhu and pray namaz and Qur'an, because it is very hard to wash the private part and clothes for every Salaah for a mazoor like me? Please guide me according to Hadith.

Impurity coming on a blanket

Q: I saw a spot of blood on the blanket. I was on my monthly cycle but there was already blood spot on another place which was not impure blood. But I noticed another spot and I'm not sure whether it's impure or not though the bedding etc is not stained. If I give the blanket for washing in laundry as the blanket is big and difficult to wash will it suffice and be pure?

Olive oil

Q:

1. Besides olive oil, were any other varieties of oils used by the households of Rasulullah (Sallallahu Alayhi Wasallam) and the Sahabah (Radiallahu Anhum) for cooking?

2. What type of oil was used by Rasulullah (Sallallahu Alayhi Wasallam) and the Sahabah (Radiallahu Anhum) for oiling their hair?

3. Is it also Sunna to oil the beard?

Masbooq completing the missed rakaats before the Imaam makes salaam

Q: A person I know came with me to the Friday prayers. He is not very knowledgeable in Fiqh like myself and we are both non-Aalims. I got out and my companion went to park, but time was running short already, so I managed to find a space, but wasn't sure whether my companion got there on-time. Anyway, I prayed and finished the namaaz. When I got towards the back row I noticed my companion, he pulled me to the side and he was concerned if his prayer was valid, he explained to me the following situation: He came and the Jamaat rose for the 2nd rak'ah, he joined them in the 2nd rak'ah. So when they went into Tashahhud and my companion got up before the Imaam made tasleem, either out of forgetfulness or ignorance, and he quickly managed to finish his final rak'ah and apparently still managed to say the tasleem with the Imaam. He didn't do two prostrations of forgetfulness either. If he neglected to say the Tashahhud out of ignorance as well, would that affect the verdict? What is the verdict anyway?