Enrolment Problem

Hi, I have tried multiple times over the past 3 weeks to enrol on multiple different devices and on the web but keep getting this error message "Your enrollment in the Apple Developer Program could not be completed at this time." It is becoming massively frustrating because I have reloaded payment details on my Apple ID and I have tried different devices as well as the web and nothing works. Apple also isn't responding to my tickets and each time I have tried I have sent an email asking for them to assist. Does anyone know how to resolve this?