Need advice

Hi Team This is a notice against a person names (Raju Deva) who used to sell Ayurvedic medicines in Jodimetla Hyderbad on roadside. I was convinced by his words and he gave medicines worth Rs 4 lalks (approx) in July 20179approx) There was a due amount of 1.5 lakhs (approx). He promised that I need to pay the amount after I recover completely. I had consultancy with doctor and it was wrong diagnosic. Moreover,the medicines did not work. I went to his shop multiple times but he shifted from there. There was no update from 4-5 months(approx).I called and informed him the same in March 2018. I told that I will return the medicines and will not pay any extra for the same. Finally with lot of discussion he agred that he will come/send some someone for the same in August 2018. No one came or there was no update from him. Meantime I lost my mobile. I went to his old place and one person told that to return the medicine to his cousin. I returned the remaining medicines and finally settled paying Rs 9000/-. Now the questions are: 1. If one fine day he comes to my place and ask for the medicines/amount. What should I do? I showed him my flat,office etc. 2. We all have dealt with cash transaction expect once I payed by PAYTM I guess (Rs 60,000 approx) 3. The due amount I have mentioned this in a white simple paper. So I would request the authority since there is no update/call from him from August,and he himself has moved from his old location(not updated his present location) also I will not pay if again he comesback asking for the amount.