Bad Customer service

So in 2013 i had a personal loan by FNB which was then settled in 2013.After all these years i went back to apply for a business credit card as all my business accounts is at FNB. After which i was told that im under debt review on the system and that there is an outstanding loan amount.So after a lot of fighting with FNB they eventually found the payment of the loan that was made in 2013.BUT now here is the big BUT now myself and my business is reflecting negatively on FNB side due to the fact that they placed me under debt review for the reason that the loan wasn't paid which was done in 2013 already.So which means i cant aply for nothing at FNB now due to them not doing their job.If this is what you call customer service then your customer service is very poor.I will be waiting for your call to see if you can resolve this as everybody is just sending me from here to there and back again.