I have never had any issues with billing with credit card companies, this is a first that a Credit Card company not being able to change your due date. I just opened this account and made a double payments in February. When I asked the customer service rep to change the due date, I was told its based off of the zip code and could not be changed. Un-heard of I have never had an account that the due date wouldn't be changed, if you are late on a payment its a plus for the company so you figure.
RIP OFFING YOUR CUSTOMERS!!!!!!!