RCI charging interest on an interest free account :-(.

Since RCS took over Edgars, it has become a **** show. I purchased items on my 6 interest free option and every month interest is charged. NO ONE answers calls and when i sent an email, got a response to say: We are pleased to confirm that your request to transfer your purchase to the 24/36 month plan has been completed. Kindly note the following: The new 24/36 month budget plan will be effective from 19/10/2022. The instalment will be fixed for the duration of the term. This is not what I asked for. someone needs to get it right, but RCI is the worst.