Fnb double charging their clients

I really don't know what is going on with my account and please will let everyone to also always check their balances after transaction been a black card holder i noticed every transaction in my account i get charged immediately and then at the end of the month will also still be charged again for it have called and called spoke one melody she promised to forward an email to my private banker who claimed she never received any email after i personally sent another email now is even worse that when i made a cash deposit i also get charged immediately and still get charged at the end of the month or is this how FNB is quietly selling money from their clients this is really wrong i hope FSP should really look into it will be sending them email also if this matter is not resolved asap