FNB shocking service

Terrible service from FNB as my son turned 18. With no warning his account was blocked as he turned 18 and needed to go into the bank to rectify. He was on holiday with no access to his account, no FNB branch anywhere close. there was absolutely no understanding or communication from FNB, they just said it was explained when we opened the account 6 years prior. REALLY??? Anyway, we get back to JHB and go into the Ferndale on Republic branch on 12 January to reactivate his account, he takes his ID, proof of residence and completes all asked of him online on the FNB system. They take copies of his ID, he signs electronically and his account is activated again. Only 2 weeks later his account is blocked again!!!! We are now required to submit his ID, fill in paperwork, supply Proof of address again etc etc. FNB has no record of anything aparently, no electronic trail of our visit to the the branch, No communication received prior to the block happening. Still waiting for this to be resolved after numerous calls, messages and emails with FNB.