Vvm’s horrible service

My account was handed over to vvm by mtn, after making payment and ensuring my account is up to date, vvm confirmed with me that account is up to date and will be closed and that they will notify mtn themselves, Its been 4 weeks and mtn still has a legal status on my account stating that the account is owing, even though vvm confirmed closure of my account with them telephonically because its now up to date... I have begged this company for a confirmation letter, confirming that my account is up to date with mtn so i can revert to mtn with that confirmation because that is what they have been asking for, from me in order for the legal status to be taken off my account with them(mtn)..., when ever i missed payment with vvm they would call me in a matter of minutes, but now that my account is “up to date” i get no response on my email sent to ********** i cant even make payment to mtn because this delay by vvm, it is extremely irritating because i have to constantly call this company and receive no help from them...