Prepaid Electricity Service Fee

***5 bought prepaid electricity for R1000 via the FNB App. Paid 130.43 VAT. Paid R500 Service Fee! ***5 bought prepaid electricity for R1000 via the FNB App. Paid 130.43 VAT. Paid R500 Service Fee! Previous Service Fee charges were R200, why is it R500 now? I am not able to reach City Power for assistance. FNB App is very unhelpful with AI responses.