Non allocation of payments

RCS blocked my account even though I made my payment a week ago. I was unable to use my card, i phoned in to RCS and was told they did not receive my payment yet. I advised the consultant that firstly I paid the total outstanding in Nov and also made due for 1 Jan on 16 Dec. She was not willing to help me even though i sent her the proof of payment while i was standing in a store trying to pay with the card. She advised me that I will need to send a proof of payment to the payments team and there turnaround time is 14days. Why does it take you 3 weeks to allocate an EFT?? This is the worst experience i have ever had with a credit provider!!