Becarefull with changes at Fnb

Hi i was busy looking at my statement this morning and i noticed funny transactions on my account adding up to about R2000.00 in total and upon querying it the lady tells me it is a new system that fnb have implemented that allows you to swipe your card unlimited ( Debit card ) regardless of you having no funds in it and the lady told me i could swipe till - R10 000 and she will charge me , the amounts can start from R 50 right up till R300 that i noticed being charged on my account and there was no notification at all about this new change and as they charge you for going into credit they add that new fee on top of your credit balance and every 3rd of 4th day they charge you again same process and it keeps going up.Please becareful with fnb as they are not being truthful and notifying customers about these changes.