RCS trying to **** me into paying twice for the same month!!!!

If i can give minus 5 stars i would. Made a payment on my account THROUGH THE RCS APP like i always do on 27 march. Up to date still not reflecting on my account. Sent confirmation of payment letter from my bank after being given the run-a-round by RCS, still nothing. Got a call from their collections department, explained to them that its their fault, still nothing. Sent emails (while on the phone with them!) they couldnt find it!!! Gave them exact dates and times of proof emails, still nothing! IM NOT PAYING FOR THE SAME MONTH TWICE!!!! This goes against the consumer protection act and the financial regulations act. As a consumer i did everything possible to prove i paid, everything. From RCS side, nothing. This borders theft, my money is out of my account and into theirs.