Bad service

I would like to advice everyone who intent to open the business account at FNB.My sister and my brother opened the business account with FNB and she was using it for long then after few months back they close the account but they said its total closed and she cant get a history of the transaction done on that account only option is to open the new one.Now she being appointed to do a R526 000 to do the work but her client want an account number but she don’t have a proof as FNB close the account instead of freezing it like ABSA does that.