Telkom has a bad customer service

Hello Peter, I'm very disappointed with the bad customer service I have been receiving from Telkom. When I app**** for a contract at the Telkom store in Canal Walk Cape Town December 2017 I had no credit record, which then meant that I had to pay a percentage upfront in order to be approved. The amount was paid into Telkom ABSA account R2300, I was approved the consultant told me that they will do a monthly debit from my bank account for the package I took and then credit me at the end of the contract the contract ended in December 2019 I chose not to upgrade because at this point my phone was still working fine and I had took out a tablet and a portable router. Long story short I phone in June 2020 the R2300 still reflects on my statement, I did a dispute on the 30th October 2020 for the R2300 and I was told the money will be credited to my bank account. The money is still not credited I called they consulted told me that I must provide proof, I told them I dnt have proof of 2017 and then I was told to go to the store where I was approved for the contract they should have the proof. I went to the store they failed to help me with proof so they logged a call for me, now the consultant I spoke to told me that I will not get the nor will it paid towards the contract that I have currently with them when I asked him why he does not know I asked to transferred to someone who knows why, he told everyone was in a meeting they will call me back. They haven't called me on their system it clearly reads that "the case is closed because I failed to provide proof of payment" if I ddnt pay the money why is it there why do they need proof of payment from 2017 when they have the records I lost an hour and 45 minutes of my time while I was there and still I walked out with no help or clear explanation.