Unprofessional Service!!

I visited MTN store in Midlands Mall, Pietermaritzburg on the 8th of July 2023 to apply for their Home Wi-Fi package. I spent approximately two hours due to their slow system. As if that was not enough, the guy who was assisting me said the system doesn't want to accept my profile because I used to have a contract with them many years ago. He said it normally takes a maximum of two weeks to clear this problem on the system. He said he will contact me when the problem has been resolved, which he didn't. Three weeks later, still no feedback from them, I went back to the MTN store. I was assisted by another lady who told me that there is nothing that she can do because customers who are still appearing on their old system cannot be assisted. I asked her to please confirm with the guy who had assisted me previously who told me the problem will be cleared within two weeks. She came back and said the guy went out, they don't know where he went. It looked like the guy is avoiding to speak to me because he knows what he promised me is different to what I am being told now. Why must we as customers suffer if MTN changes their systems? The level of incompetence and the unprofessional manner this matter was handled is appalling!! So at the moment MTN is refusing to provide their services to me!!