Paid up letter not issued for RCS account that was handed over to Vericred after being settled

I received a settlement offer to settle my RCS account from Vericred by 30 March 2018 which was R19589.00. Agreed settlement amount of R19589.00 was paid on 26 March 2018 (R15000 and R4589 respectively). Vericred subsequently said they cant issue a paid up letter because I was only supposed to make 1 payment despite receiving the full amount before the 30th March through a payment method I got from them. And they also said they are waiting for RCS to allocate the funds and issued a paid up letter.

4 weeks later Vericred has not send me a paid up letter from RCS and up to this point my credit report has not been updated with the payment that was made. I have been told that RCS is busy allocating the payment to my account but how can this take 4 weeks?

At the very least my credit report should be showing the amount that was paid and this is RCS's responsibility; can you please advise when I will be issued with a paid up letter for this account?