IMPOSSIBLE TO CLOSE ACCOUNT & BAD SERVICE

I have been attempting to close my account with RCS since December 2014. I phoned the Customer Service centre and was informed that I need to pay all outstanding amounts and send a letter requesting the closure of the account with a copy of my ID through to [Email Removed] I paid the outstanding amounts and the proof of payment along with a copy of my ID and letter requesting for the account to be closed was sent on 13 December 2014.In January 2015 I however have not received a confirmation that the account was closed and to my surprise I received another account stating my account is in arrears.I contacted the customer service centre again and after having the phone slammed in my ear I spoke to a gentleman who confirmed he will take my e-mails up with the correct department and I must not worry about any fees after 13 December 2014 as I will not be liable for this as I have proof of requesting that the account be closed in December.I again e-mailed him the letter with proof of payment and received an acknowledgment of receipt, however in February I again received an outstanding account as well as numerous sms's stading I am in arrears!I again phoned them and still no joy!