Friend refuses to pay loan back.

I need help as a friend of my husband Mr A, had borrowed money for his son's education. Mr A,owns a xerox shop in Nagpur. My husband worked for a reputed company, which was situated just close to Mr A's shop. During the period, my husband gave Mr A, plenty of business at which cost Mr. A, made a lot of money. During that period a sort of friendship developed between them and Mr. A asked for a loan from my husband, for his son's education. Details of the money lent are - 2016 - 2 lakhs, and he did return it after over a year but without interest. December 2017 - He borrowed Rs1 lakh. During this period, we had to leave Nagpur to go to Goa. I continously requested him to pay us our money, as we needed to start from scratch. After a year in 2019, he paid Rs80 Thousand and Rs10 Thousand in 2020. The balance he refuses to pay as the company of my husband (in Nagpur) has not cleared his bills. I have not even asked him for interest, yet my principal amount should be paid back. Can you help please.