Telkom a ****mer

I phoned Telkom for a new contract, but I wanted to use the number which was ported from MTN to Telkom in 2019. The sale went well the agent advised me that "Yes" I can do that. The phone was delivered on the 30th June 2023, I then phones Telkom advised them that the phone id delivered but will I be able to still use my old number. I was advised no I cant. I then asked them to come and collect the mobile phone as I do not want to have a new number, the agent was like "You returning it just for that and I said "Yes mam". The mobile phone was collected on the 3rd of July by Vincent Tefu Molaudzi, the same guy who delivered the mobile phone to me on the 30th June 2023. He asked "Hawu you returning it so quick?". I responded "Yes, I cant have a contract on their terms with regards to my mobile number and I will port to MTN again and have a contract with them". He did not give me a a Waybill number, but a receipt from Courier IT Sender copy number ***0. I signed this all was well. I then went to MTN ported back to them and got the mobile phone I wanted with my old number. I now today 20 July 2023, get an sms from Telkom that they will be debiting R1300.10 from my bank account. But how? I call them and was pushed from pillar to post (which did not happen when I app**** for a contract with them). 4th time I was getting annoyed and apologized to S'thembile Gumede who took my call. I explained my situation to her and she advised that the contract is not cancelled as Courier it did not list the phoned as returned on their side. But I asked whos' fault is this. Why must I have to call them to fix this and then being told boldly that I will be debited cause the contract is not closed and I do not have the phone with them? Nor did I call or use the phone, surely this should register on their side that the mobile number has not been used. I need this resolved ASAP. I will not pay for services that I have not used and I will take this to the ombudsman if no action is taken from this platform. Calling Telkom is a waste of time and I do not have such. Really annoyed.