FNB has bad service delivery

Straight to the point, fnb has caused me nothing but pain right at this time. They sent me an email asking about a certain payment that was made in to my account and they wanted a reason for those funds, I then rep**** to the email address with a statement explaining where the funds came from, at the time my account is already on freeze so I’m not able to make payments or transfers. I tried calling the contact centre to enquire and they sent me to the very same person who sent me an email, they couldn’t even try to help me unfreez my account. I called the person who sent me the email and I couldn’t get hold of her. My debit orders are now bouncing and to my surprise they blocked my account. It’s been days now trying to get assistance and trying to unblock my account, but no one is saying anything. Even the person who sent the email isn’t replying to my emails or calls. I am extremely frustrated and this is a very bad experience and because of this I also want to change banks. Fnb is a bad bank