Cell C the bullies of the private users

I have a data sim with Cell C. In 2019 August there was a problem with the servers and I was unable to use the data on the SIM card due to the problem Cell C had. I phoned Cell C customer care a lot of times as I’m using the sim for business as well as private and they were unable to solve the problem. This problem continued and in September 2019 the last time I called them they said they will call me back once the problem is solved. Since then they didn’t call me back as I was waiting for the call. I used another service provider in the meantime as Cell C didn’t provide me with a service. It is a contract SIM card with a fixed price of R499.00 per month but on the debit order it was deferent. I reversed the debit orders from October with the hope that they will contact me as I spend more than R700.00 on calls to Cell C over the 2 months. Since last week my wife received calls regarding my Cell C account from Cell C lawyers as she is the alternative number on their system. I am the contact person with Cell C and they aren’t able to contact me. All of the persons Me and my wife spoke to at the lawyer firm from Cell C have serious attitude problems and is very rude. They are now requesting R4000+ from me and Cell C haven’t even contacted me. Please assist me with this matter.