AFTER PAYING ON TIME MY ACCOUNT IS IN ARREARS

I opened an account late 2015, payment was due end of December, after getting EFT details from the accounts department at GAME in the Middelburg Mall I made a payment on the 28 December, Jan 2016 i received a statement that showed my account is in arrears. after contacting RCS numerous times, logging a complaint on Hello Peter and sending numerous mail with proof of payment my account is still in arrears and I am listed on Trans Union as a slow payer. its been more than a month and the issue has still not been resolved. I URGE YOU NOT TO OPEN AN ACCOUNT WITH RCS!!