Enough FNB problems.

I and my family have had a number of problems with FNB this year and I have already been thinking of closing my account. Today is the latest problem. Last week I booked a flight ticket with Mango on my cheque card. The payment was declined because it exceeded my purchase limit. I STILL HAVE THE SMS saying TRANSACTION DECLINED. So I booked a new flight with a different card. Though Mango said the transaction was approved, because FNB said it was not, I re-booked so that I didn't miss out on my flight ticket. Today the original payment has been authorised, though it was ORIGINALLY DECLINED AND STILL EXCEEDS MY CARD LIMIT, and now I have two flight tickets for the same flight, in the same name. Mango won't cancel one flight and now my account is overdrawn.