Unnecessary charges charging from last 2 months on my cheque account.

Good day dear FNB, I am just frustrated with fnb and its services. I have been charged unnecessary charges since 2 months. In February got charge R 90 something as service charge for nothing and in March two types of unknown charges 1. R 40 and R 99 for service fee. I dont understand for what I am getting charged since I am already paying service charge of R 199 per month every month and I cant afford more than that. If you want to continue charging in that way, please be clear and I will go close my account at branch. This is not the kind of services I am expecting from FNB and I am the fnb account holder from last 13 years. Please refund all the charges charged from account before I spread this to wider audience on social networks like twitter and facebook.

Regards,