Credi card *******!

After FNB has been calling offering me to take up a credit card with them I would tell them I already have a credit card with Absa and they offered to pay off my Absa credit card if I take a credit card with them which I eventually did. The consultant at the Maponya mall branch and others over the phone failed to advise that I had to fill in a credit card switch form now I have incurred extra charges for paying Absa personally, I have been getting paid on the 23rd through FNB for 5 years but someone decided that my credit card debit order date will be the 15th knowing that I will change that date and they will make money by billing me pro rata. I was debited R1,333 on the 15th of September and again I will be debited R1,155.50 on the 30th of September so within a period of 15 days I would have paid FNB R2488.50 which is RIDICULOUS no one told me that there is pro rata billed they just said there will be 2 debit orders in the same month because I changed the debit order date but failed to say how much it will be. FNB has gone from the best bank to the WORST bank. I REGRET taking up this credit card with them and I WANT this sorted before that debit order goes off. INCOMPETENCE!!!