Bad Service

I opened an account with Discovery bank last year during theock down. I have never used the account, in fact the account has some hold on it as per the Consultant I spoke to however it has accumulated bank fees since last year. I cannot be expected to pay these fees as I don't understand where they come from and the account has a hold on it. How does an non existent non working account accumulate charges. I was promised a call back when I spoke to a Discovery Bank Consultant 2 months ago and I still haven't been called. This needs to be sorted out as it is day light *******. How does a frozen account accumulat fees?