FNB - NON-EXISTENT CUSTOMER SERVICE

My query dates back to December 2022. Two interest charges, R8.53 (Nov) and R14.38 (Dec) reflected on my FNB CREDIT CARD. I received a pathetic email from FNB Contact Centre advising that the R8.53 could not be found???? Then, on 29 December, the charge of R14.38 appeared. Two messages have been received advising that "the complaint has been assigned to Retail Service Recovery". All I want is an EXPLANATION as my Card Account is ALWAYS settled in full. I want a Consultant to PHONE me, no mails or messages!!!