VVM CLIENT SERVICE SHOCKING

My wife's RCS account was handed over to VVM due to an error on a previous collections agency's side. I settled the full outstanding on the account, R7300, but got told to pay an additional amount of R435 due to an error. Anyway, since it was handed over to VVM, it has been a nightmare. You make an arrangement today for the end of the month, they call you next week to make a new arrangement. You request a final settlement amount, they give you a figure and the next thing you get an sms with a new outstanding balance with a new payment due. You phone again, then they will phone you back. They phone you back and you get the original amount due. You agree and make arrangement to pay this weekend. When you ask when you can expect the paid up letter, you get told 3 to 6 weeks. You ask why, after 3 months back and forth and harassment every week, you get placed on hold and the call drops. You phone back to formally complain, suddenly the senior that phoned you 5 minutes earlier is in a meeting. They will phone you back. This all for R435 with a discount comes to R342 and believe me, its like they doing you a favor to give you a discount and writing off the difference. All In want is to get this out of my life and get a settlement letter in a reasonable time. 3 to 6 weeks, really?