Money Lended to Relative but he's not returning it Back.

Dear Sir/Madam I Work in a private firm, I lend 21 Lakhs to my uncle on finance borrowed from my co-workers, its Been 2 years, On Rs.21 Lakhs he paid sum of near about 965000 out of which Rs.810000 is Interest and remaining one is principle , now my uncle have nothing to pay, but my co-workers asking for money on regular basis, its been 8 months he's not paying a single penny , he only have a house which is also on his brother's name from which has taken its 1/4 part , so he's having nothing from the property too but his brother is assuring that he will pay the pending amount when the property will be sold, Property has loan on it which is taken by my uncle for its 1/4th part , I don't have any cheque or agreement but i am having all the transactions in my bank statement. So he came 3 months ago here to meet my co-workers and take time for 4 months that in 4 months he will return money of all , and now 4 months are closing next month on 6-june-2021 , so please let me know what action i can take.