Fed up with RCS

VVM RSC's debt collecting department sent us numerous messages that our account is in arrears but we do not get a statement. We paid the agreed settlement amount TWICE!!!!! The last payment we **** was on 19 May but they keep on sending us messages when my husband phones to tell them we did make a payment this is the ref number and we made it from ABSA to ABSA they can not pick it up on their side. I spoke to a very rude Chrizelle and sent het the proof of payment. We want to bay a house and the RCS keeps getting in the way because they do not update their system. We just need a paid up letter to proof that we paid the account if full TWICE!!!!! After the fist time we paid up the account we cut up the card and asked them to stop the account. After 2 months we get another message that the account that we stopped is in arrears again..... HOW DOES THAT HAPPEN?????? Please just send us the paid up letter and stop the account we want to bay a house!!!!