My Relative is not returning 30 lakhs paid through cheque and cash (Gold )

Hello Sir i had paid 30 lakhs to a cousin of mine in 2019 and he promised to pay 24% interest per annum. We did not enter into any kind of contract intially as he was my cousin and more than cousin he was a friend. He paid interest initially for 16 months ( though in instalments in the form of cash and account transfer and some adjustments. ) He used my fund in his restaurant which he made on a rented premises. Every thing was fine, but after 14 months he started avoiding paying the interest. After regular follow ups through various means of phones and mails and he finally agreed to write on a 100 rupee stamp paper that he owes the amount to me and will be paying interest ( now at 14 % per annum instead of 24% ) till the time he clears the full principal amount I was ok as he said that his business was not doing good and wanted that me to reduce the interest rate and I agreed to the same. He paid me interest for 2 months from the date of the new contract and again started avoiding my calls , whatsapp and mails. I gave regular reminder and finally have lodged a criminal case against him in the lower court of forgery, breach of trust and cheating. Summons has been issued and now he has gone to the highcourt against the summon and has also mentioned in his petition that I forcefully got his signature on 100.rupee stmp and he does not owe any money to me. Pls advise what to do now