Fed up with the CallCentre and misleading SMSs from FNB

Today 12:01pm I received the below SMS: Your DiscoveryCard payment is overdue. Please urgently make a payment of R856.54 or call ********** 847 for assistance. DiscoveryCard issued by FRB Ltd.

I called and spoke to Charity. I was questioning why on the 29th July I received the below SMS:

As at 05 Jul your Credit Card Acc ..692000 statement balance is R8707.35 and a min pmt of R436.00 is due by 30 Jul. DiscoveryCard issued by FRB Ltd.

I was questioning why the amount were different - Charity was so rude on the phone speaking at the same time as me and being abrupt. She was adamannt noting that she's trying to explain to me but in a rude manner. When she told me that the 2nd SMS notes the amount for payment at the end of this month I told her that the SMS is misleading and should note when that amount is due. She was then rude again about it. I am contemplating cancelling my discovery credit card as I am not up to dealing with such behavior. Even when I asked her to give me her name and surname she sounded fed up when I asked her to spell her surname to me.

Kind Regards Rita