Terrible experience, Bad service and unprofessional

I had mobile phone contract with Telkom for 3 years , during my time with them there has been some ridiculous amount that I have been charged , that’s okay , my contract was then ended some time in June this year 2025, I was then told that there is still going to be a deduction still even though I have served notice in time for cancellation. On the 07 November 2025 I received an email with a statement dated 01 November 2025, stating that there is a credit on my account of around R1 121.65 I then reached out to Telkom and indeed they confirmed that there is a credit and the money will be credited to my account where they used to debit. I was given an email where I should send my bank statement showing atleast one debit order payment I then did send the statement, I was told to wait for 72 hours , for the refund to be processed, the 27 hours has now lapsed and todate there is still no refund in my account, I have been communicating with customer service with no luck , they are now saying the 72 hours doesn’t mean I will get my refund and that there is no time frame for the refund to be processed, I was also told that my matter is under investigation on the last department, I mean what is there to investigate the statement and my account is a proof enough that I’m entitled to my refund. I want my refund , I would never recommend anyone to have a contract with Telkom their service is horrible, and I’m glad my contract is over with them .