A friend of mine (A Lady) tot its a good idea to negotiate with AL for his brother's debt and she ended up kidnapped and raped by them. The gang made her a sex worker in the end to repay the loan since the bother went on the run. They will continue to harass you by any means to get back their money.

My advice is the change your number and move immediately to condo that offer several tiers of security so they won't be able enter and harass you.