Don't trust FNB

Worst service ever. Just got excited buying my first house and decided on FNB. I got a debit order request for 24 February 2025. Accepted it. House got registered and today when phoning them to confirm if my interest rate are correct cause I was promised a discount if I open an FNB account I al of a sudden receive now my statement I must pay 31 January. Phoning them they said I should have received confirmation of the installment due saying I didn't now I'm sent from 1 department to another without any assistance. Putting myself under heavy stress and I'm pregnant with high risk pregnancy