Not helping to access money

My husband (who also banks with FNB) has been trying to get a hold of someone to try and help him access his account. He is currently living abroad. He still gets PIN numbers to his South African number which he is not receiving on a UK number. Phoning does not help as he needs to be on the line a long time in hoping someone will help him. And phoning from abroad is very expensive.

Even I have made contact on FNB online help and they said he should come to a branch. How is he suppose to do that while sitting in the UK?

App or internet banking both works with codes being sent to his SA number to access and they don't want to help. He still needs to pay people or help his parents in SA out of that account but he can't access it.

Please use his ID number to access his email address to make contact. Entering his phone number is not working.