Terrible Telkom

Telkom is a terrible contract to have near the end of the LTE contract they billed me an extra 500 rand on my line and told me that someone on their side increased or took of the limit on my 5 gig line. I did not ask for this and did not use this because when the data was done I could not use the line. I have been logging tickets and requesting a call back because phoning and trying to get the get hold of the correct department is not happening. It have been 3 months and no one has contacted me. I have tried to cancel my contract and cannot get this done either because their online service is just as bad as their contact centre. I will not pay for something I did not request and they will black list me for not paying them.