Trash service, **********

Mtn is more like **********, I contacted one of their consultants on the 9th of April to cancel my contract which was ending in may the lady who I spoke to said she did,my premium was R309pm then all of a sudden when the contract is about to end I got over charged for two months they debited R399, called your useless call Centre again for assistance the lady said it’s sorted out they will fix the problem!!! Today I decided to check my credit score and I saw it shows that my mtn account is in arrears and that I need to pay R900,what’s shocking is that no one contacted me to find out what’s going on , y’all didn’t even try debiting money from my account then y’all claim it’s in arrears, the lady even said she can see a requested for the account to be closed she can’t see what was the judgement so customers should suffer cause of your incompetence????? I fail to understand why my bill says my installment was changed to R309 to R409 but you did even try debiting money from my account . I need explanations, cause I’m definitely not gonna pay money that I’m being ****med