Slicepay — Harrass me and my friends and family

My payment is a delay from slice pay one person whatsapp me and harasses me and then he came to my home and asking the money so i paid him my whole amount of loan in cash. But still, slice pay people to harass me and asking the money i receive so many emails from slice pay for asking the money i don't know that who take money from my home is from slice pay or not but they pretend he is from slice pay
Now what should i do and i don't want to make any payment to slice pay, they keep harassing me and give me a thread and they call my friends and family person and asking for money.