RCS worst people to deal with. Their license should be revoked

RCS are a bunch of *******. Tuesday 11 February at about 19h17PM I called their call center requesting for settlement amount for my accounts (Game, Pick n Pay and Queenspark and Coricraft) I was given the amounts which I settled immediately. I then sent proof of payments and requested that they close my accounts and provide me with paid up letters. This morning I receive an email giving me amounts I need to pay again (adding to what I paid) which does not make sense because I got the settlement balances from them, so where are the new invoiced amounts coming from. All this, after they made a mistake and said one of my settlement balances was R10 000 less than what I should pay. A mistake they did not own up to