Complaints FNB

I mistakenly paid a FNB loan twice on 19th May, when trying to save the public beneficiary account. I reported this immediately to FNB to try and retrieve the second payment which put the account in credit. After 4 complaints and submitting supporting documents the matter is still not resolved. Some of the numbers listed on the website are not functional. When phoning you are put through to one department after the next and each time have to be verified and still no joy after spending hours on the phone. No service!