Correcting the direction of the qiblah in the masjid

Q: In my masjid, the qiblah is off by a bit. In between 35 - 43°. (Closer to 40° in most apps) 

They are getting new carpets fitted insha Allah. However, the committee are disputing on whether to face it to the qibla or keep it as it is. They will lose a few musalla spaces if they angle the carpets and it will make the carpets not match the building which they don't want. 

I've said, although the salaahs may be valid, it would be best to angle it and go closer to the qiblah, preferably within 20°. Could you give a final answer into the matter?

Taking back the sold car due to the customer not paying on time

Q: Person A gave a person B a loan of R100 000. Person B also purchased a car from person A to the agreed value of R250 000 on a pay off basis. 

Person A decided after a few months he wants his R100 000 back and full payment of the car. By this point, person A was already paid R200 000 for the car. 

Person A then took the car back because person B could not meet the deadline for payment. 

This all transpired over 8 months. So person A is sitting with the R200 000 plus the car and never wanted to give person B a cent back claiming usage charges, insurance charges, wear and tear cost, etc. 

After much back and forth person A gave person B R25 000 back. Was this fair in the eyes of Islam ?