FNB making life difficult

Just want to warn everyone what ever you do please don't update your profile on Fnb accounts. I made the mistake of changing my address and now they are threatening me with a if you don't fica your account we will lock it. I phoned the number provided and they are making me jump through hoops now asking for different documents every couple of minutes. I'm also a private wealth customer but seems to lost my private as he's not answering my calls or responding to emails. I feel like going into the bank and closing my accounts. Very disappointed in the service.