Disgusting service

For the past 3 months I have emailed and called Rain to change my debit date to the 1st of each month. They cut the facility on the 25th of each month but take the payment on the 1st when the money is in my account. One call last month in particular displayed their lack of professionalism, the lady refused to speak. Their response to not being able to change the date is, I am a upfront client. IT MAKES NO SENSE. If I pay on the 1st of each month I expect just like everyone else that I should have cover till the last day of that month. #***