RCS is the worst cannot allocate payment

On 30 November 2018 I made payment on my account at a Foschini Store. RCS suspended my account because they say I never paid. I sent the proof of payment to them on 3 separate occasions and today is the 20th of December 2018 and they still haven't allocated my payment, after they received the proof of payment 3 times. Somebody in RCS is *****ing my payment and now they cannot allocate it. I am tired of escalating, I need RCS to sort this out. I am tired of always calling and holding for 30 minutes or more and nothing happens, always a total waste of time. I want RCS to resolve my payment today. They had more than enough time time to resolve it. They can see the proof of payment I emailed to them yet nobody does anything about it. I have lost faith in RCS and I will never use them again for anything no matter what. I will not recommend RCS as a service provider to anyone. RCS must be the worst company in South Africa in my books.