Bad service and poor customer service

Very poor service from MTN im not impressed at all. I took up home wifi on the 27th of November 2024 and obviously i had to pay a certain amount of money before they could come and deliver the router to me and i did just that however to my surprise when my statement comes it does not include the upfront amount that i have paid and i called them more than 3 times and spoke to agents who said the issue will be resolved however the funds are still not allocated on my account. I spoke to Nobuhle and Sylvia from the collections department and guess what they all requested for me to send them proof of payment and i did just that however the case was closed without my matter being resolved and mind you they have been debiting my account and im accumulating charges for these. Its really annoying and its placing me in a negative situation and if i had know of MTN's incompetency i would have never taken up this contract with them....ITS ANNOYING AND FRUSTRATING