Unauthorised debit orders

I took out a contract in 2015. My contract was coming to an end September 2017. I called them in May to pay off my contract because I didn't want it anymore. They told me to pay just over R1600 to pay up the contract. I paid it. I called again to ask if anything would be deducted from my account. They told me that at the end of May they would deduct R141 for cancellation fees and at the end of June they would deduct R250 for the calls I made before I ended the contract. I called twice and 2 consultants confirmed the amounts. At the end of May they deducted the R141. At the end of June they deducted R2200 instead of R250. So I called them and they gave me a whole long story. I asked for the call recordings for the 2 calls I made to the consultants. I gave them the exact dates. I kept on checking up on it and I got NO help from them. Again at the end of July they deducted R1800. Everytime I do a reversal, I'm paying bank charges!! They didn't deduct anything in August but now today(22 September), they tried to deduct R1149. Why is the amount changing all the time?? I'm willing to pay the R250 that I was told to pay, NOTHING more!! It's been 3mnths now and no one has helped me with the call recordings. Pathetic service from Cellc!!