Emotional abuse and harassment from MTN

I have been keeping this issue under wraps and have tried to solve it with MTN but their lack of understanding and communication and professionalism is just not right. If this issue is not fixed soon I am taking this issue to Ombudsman. I finished a contract and currently have NO CONTRACT with MTN whatsoever. I buy my own airtime, I have no bundles of any kind coming from them. Now I'm being called by lawyers telling me that I owe money from a contract. I called MTN and queried the situation. I was taken to two departments. One department (the billing) one lady said that my name is appearing on the system and I repeatedly told her that should be a mistake. Then she transferred me to another department, if I'm not mistaken the cancellation of contracts. The lady there chacked her computer and she confirmed that my name and information is NOT THERE. That means I have NO CONTRACT. I told her these lawyers are on my back and it's annoying. Each time I explain to them this situation, they just drop the phone after I've spoken, how rude is that! There's something going on. Either someone is using my name and number to embezzle their employer MTN or there's a **** where they're trying to come after my funds *******y because I even had to block them from my SALARY!!! THIS IS ENOUGH! someone better call or let me know what is going on. If this eventually goes to Ombudsman, I'll have to complaints, embezzlement and harassment 😠😠😠