Disappointed with FNB

I am truly disappointed with FNB. i took a temp loan in 2020 and FNB listed me which took 3 years to clear me. For a temp loan that was paid in full in 2020. Going to different breaches trying to clear myself with no luck. Called the call agents but they would send me incorrect clearance letters. Took a loan for around R3500 but they would send me clearance letters for R35 000 that are not even signed or have bank stamp. Now my credit has improved very well but i can not apply for any credit because FNB says I've missed debit orders for more then 7 time within 12 months. But my clear score shows i've never missed a debit order since 2021, which it is right. So today FNB north breach is under renovation and they have a table set out side. Yet again we tried to apply and it still decline. My credit score gets a negative again. Can some from FNB correct this and call me with facts.