Paying bills manually? is that possible?

I want to pay my bill manually but when I am online, i can only change my CC# but there is no option to pay manually. I called several time on Friday and was finally told my account rep was on leave, and someone else would call me back, but no one did. I was also told i could call 24/7 for help, which is also untrue. My service is schedule for interruption on Sunday and today is Saturday and I can find no one to help me pay this bill after several days of trying.