Gave money to the person but not returning

My parents have been giving money to a person since long ago (around since 2015) and he promised them to return the amount along with the interest but no note was written on paper but the amount taken every time was written in piece of paper along with the monthly interest calculated and added every month by the receiver till 2020. After covid times when my father & mother reached him asking for the amount & interest, he paid very few which is like around 3% of total amount including interest. Later he stopped answering our calls and we went to his house several times and in 2022 September he promised to clear the complete amount by March 2024. Now when I called him he said he has no money now but will clear the money as soon as he gets it and when I asked him about the date he's just cutting of the call saying how much amount asking us in reverse and not picking up our calls. These transactions were mostly in cash and we have evidence of the person's handwriting in the paper who wrote all the amounts on a sheet of paper and recently when I called him I have recorded his call. Can we take the amounts paper & the recent call recording as an evidence if we file a case against him