Stopped the harassment. I dont own any money to anyone

My name is Shahieda Samson and I have been harassed by Lexmed. Last year (2020), I received a sms about me not paying a doctors bill from a doctor which I went to in 2018. I called the doctor (whom I will not mention) and they informed me that everything is up to date. If there was any issues, they would have informed me about it. I asked Lexmed for the original bill. Up until this point, they are unable to give me the original from 2018. About a month later I received another sms stating I own another doctor from Jozi, an amount which need to be paid. Mind you I don't even stay in Jozi. I live in Cape Town. I have medical aid, so I don't understand what the hell is going. I always recieve a bill from the doctor if I have to pay in. I would like LexMed to stop sending me sms to my number *** and threatening me that they going to give me over to the legal.