Payment made on RCS app not reflecting a week later.

Payment was made, but not reflecting. I made payment using the RCS app like I do every month but this month the payment is not reflecting. I am now asked to provide proof of payment, how on earth do I get a proof of payment with beneficiary details when I paid using my card on RCS platform? I am extremely annoyed the more I explain I can only show the line item on my statement with a screen shot I'm still asked for proof of payment by different agents helping my query. This is ridiculous and I want it sorted out TODAY 31 Aug. I will not pay any penalties and I will not be happy if you list this as a missed payment. I made payment I want it sorted because this is your app I used not an EFT.