Accounts query

I had been with fnb for some decades as a client but i feel this kind of manner is not acceptable i had three loans with fnb i went and made a settlement some time last year in July now i received an sms 0n the 15 April and went to the branch that is near my area i couldn't got help still cause of the long waiting on the line holding then i went back home next day went back i use the telephone banking calling them i waited holding until i got through i spoke to the lady from the dmc khumbulani i gave her my details and she checked and she agreed that i have an out standing balance of 624 and cents i asked her y now cause i settled my loans she said they tried to get hold of me the couldn't get but still my concern is that i'm banking with this bank and mind u my money gets into fnb acc and if y they couldn't debit the balance because before i settle my loans they use to debit so no my worry is should i continue with this bank or close my accounts with it for this treatment i got I'm so disappointed with fnb y not calling me making me aware its worse now no longer having a permanent job. I will not leave it like that more action will be taken I will go eto speak out to get the truth