Misuse of my contact list

I have taken a credit card from a company name SlicePay . Due to covid currently I am unable to pay the amount but promised to pay by 20th December. But in the mean time they have hacked my contact list somehow and calling them for money collection. Different kinds of abuse and threats are been given. I am not the only victim of such case there are more than 100 people victim. When got in touch with their team thru email and call no positive reply I got thru their end. The answer was we have asked the field team to stop calling you. When I asked them to accept that my contact list has been hacked they disconnected my call and blocked me. I was on call with their executive- Geetha Gupthe this morning. SlicePay is defaming me in my contact list. People are literally behind me as they are being abused thru slicePay team. I have all the proofs of the same- call records, whatsApp chat etc. Miss. Geetha has also said that get a FIR copy then we will see what has to be done. They are literally torturing everyone. Please help me before I commit suicide because of this pressure. Please