Slice Lay — Harassment calls n emails from slice pay agents

I have downloaded a slice pay app and I didn’t even recieved my credit card also I haven’t used from a long time but I’m at getting calls every 5 minutes everyday nearly 15-20 calls which is very unbearable .due to this I’m very depressed .slice pay has been sending emails to pay the amount which am not entitled to pay.if I commit suicide the app will be responsible of it