Repeated unexplained account blocks

I'm extremely frustrated with FNB for blocking my account yet again without any clear explanation. Its an account i deliberately kept when i moved overseas, hoping to continue managing my debit orders and transact normally. There has not been no unusual activity on the account. Despite this, I keep experiencing repeated account blocks, which is incredibly disruptive and stressful, especially when managing it from abroad. I went through the full FICA verification process only a few months ago and was assured everything was in order. Now, Im facing the same issue again, with no communication as to why this continues to happen and how can it be prevented. If this is not permanently resolved, I'll have no choice but to close the account and move my banking elsewhere. For other South Africans overseas: Any recommendations of a South African bank that treats its overseas clients well? Please share your experiences and suggestions.