FNB frozen account issue

If I could give half a star a would! Without any heads up fnb just froze my current account due to “lack of personal information” even though I’ve had this account for 11 years. I’ve been emailing them back and forth regarding this and no one seems to give a S***. I’ve filled in the paperwork they required with identification details and a week later I’m still waiting and the account is still frozen. As I’m currently in the UK it’s not that easy to call them or visit a branch. I’m very disappointed in their lack of urgency as I’ve explained them my situation various times to various people. Come on FNB. You’re gonna lose loyal customers with this attitude