Cell C is disgusting

I have taken out a contract with cellc in january 2017 and cancelled 2 of my old contracts. Cellc did not debit my account until april 2017.when i went in to the store to query this the consultant instore called their trade partner services and asked them why did they not debit my account. The consultant from trade partner then told her something about i must not pay and just wait and see what happens (this was in february) when i queried it again cellc then told me the money that i paid in cash to cancel those 2 contracts where not allocated for 3 months and then cellc decided to allocate that amount to the cancellation and then ran a debit on my account of an amount grater than R5000 at once. I phoned them to query it and got no help ever since.i then called numerous times to put me on a payment plan even thou it was not my fault and a mess up on their side.i then got retrenched from work and called again to put me on a payment plan on numerous times and still nothing was done.i have emailed all documents to them.i spoke to manana from cellc from the accounts department who was to lazy to help and then asked to email ********** and spoke to nicolene via email and then got no response. I then emailed them again and received a response that my account is handed over to the legal department and is sitting with an amount of over R16 000 which i am now not willing to pay even thou i offered to pay for something that was not even my fault.i request cellc to sort out something and remove my name from your legal department because i am listed as a bad payer and all of my accounts are up to date. Can someone please help???