FNB does not try to help!

Do not use mobile banking to take up new products, I was offered an increase in my revolving facility where they kindly changed me from "pay as you use" to paying for the full facility regardless of the amount used. I used the facility for 2 weeks over the end of the month and my debit order bounced (facility payment was 5 times higher than previous payments with minimal capital increase in facility use). I immediately cancelled the extended facility only to be have 2 months of arrears be charged to the account by the first two weeks of Septemeber. Now... I have been waiting for a solution since the start of Septemeber when I raised this as an issue.