KYC

I've been receiving sms's from FNB threatening to freeze my account because the proof of residence I sent is not correct, the proof of residence I actually submitted is one of the documents listed on their website, I called in yesterday and spoke to a consultant Mantsi who said she's gonna follow it up, I should say she did was she was suppose to do, she called me today but I was not happy with the response. they want me to go to the branch for my account to be updated, I won't be able to because I can't, there are channels they put in place like emails, why are they unable to update the account with what I submitted and need me to go to the branch. I am not impressed at all, I'm thinking of closing the account if this is not sorted.