Cancellation of my contract without my request resulting in huge device fee

Due to financial issue that arose I had down graded my package in Oct 2021. I found that by downgrading, it costed me more as I needed to buy extra airtime and data and then asked for my package to be changed back to my original package in Jan 2022. My normal bill amounted to +/- R1500 pm for 2 contracts and this month I got an invoice for over R8 700 .... I called Telkom on Monday morning to query and was told that the contract was cancelled and cancellation fees were applicable. I did not a no point want cancel the contract and neither was I told about any cancellation or added fees. The lady advised that she would log a dispute and when I asked for the ref number, she said that she would sms to me. By the afternoon, I didnt receive the sms and decided to call Telkom again to make sure the dispute was logged and for the ref number. The Second call/lady advised that a dispute was not logged. The amount applicable was actually the device costs of my handset and because I had changed my package, my contract was cancelled and placed on a contract without the handset. The second lady had assisted by logging the dispute ***. I was told an SLA of 72 hours. I cannot afford this debit to go through, and personally have no faith that this dispute will be resolved before the debit order on the 25th. I need urgent resolution on this as R 8 700 is my rent and food for the month - I did not request a cancellation nor was I told of any charges if I changed my package. This debit order cannot go through.