Despite this company not being able to provide any...

Despite this company not being able to provide any proof of a contract between myself and MTN, they continue to harass me daily, sending me rude sms's threatening my credit record and rude phone calls in which I've been sworn at by their callers. All who urge me to pay some fictitious amount from a contract that doesn't exist.
Despite my insistence, they will not release the recordings to me either.
Once I threatened to sue them for harassment, the phone calls stopped and now they just send threatening sms's every single day.

This is the kind of company they are.
Hardly a shred of professionalism to be found.