RCS refuses to close my account after a month

I've been with RCS for 3months and with tht 3 months I had endless problems Ive paid my account in full on the 18th of November 2017 today is the 13th December 2017 and my account still hasn't been closed I spoke to a call centre agent which tell me my account is still active aNd is pending closure however her superior Voyiso sounded neverminded on the phone he was not helpful at all ther was no assistance from the agent or supervisor RCS is bad for business. I over paid the account by R140 by in my MSG's it shws I owe R10. I WANT THIS ACCOUNT CLOSED