Contract reversal

I called MTN from the 30/06/2025 today is the 03/07/2025 to report issues with the contract I was sold by a guy called Thabiso from retention department. I received a new sim and bought airtime worth R220. I tried to buy voice minutes but it kept saying I have no airtime. I tried to call using that airtime and it still said I do not have airtime. I probably spoke to 12 consultants with no luck of help. The next day I could not even use my data then I called again and requested for this contract to be cancelled or reversed. They told me that I should wait for 7 days. I asked to speak to the manager and she called me back unfortunately at that time I was already at a nearest MTN store. She cleared the error of not being able to use my airtime and data but told me that the contract I’m on does not allow me to buy minutes. She also said I only have airtime worth R160 and I told her I want my airtime because I did not use it and I have proof that I bought it. She said she’ll have to check on the system then she’ll call me back the next day, which was the 2/07/2025 but she didn’t call. She also said she’ll send a message for Thabiso to call me to cancel the contract. None of them despite assurances that within 24 hours I will be assisted. I again called back trying to find this Thabiso guy and I was told he’s on a call but they’ll give him a message to call me back because he’s the one that can assist me. I further told to also send a message to their manager to call me back because I’m now fed up with this whole thing. The funny part is that when this guy sold me this contract I had to call another department to clear something then he said when I’m done I should call back and request to speak to him. I did that and I never struggled but now that I want this contract to be reversed I can’t find him. I also sent an email to *** to tell Thabiso to call me because when Thabiso needed my SAFPS letter he told me to send it to this person and they managed to give him the letter but now they can’t even reply to my emails. I would never have taken this contract if he told me I won’t be able to buy minutes. I want my lost airtime and reversal of contract. I even told the lady I spoke to yesterday that if they think they’ll call me after 7 days just so I can cancel the contract I will not pay a cent because I’ve been calling long before that to reverse it.