Where can I get the Form to renew iOS Developer Program I am trying to renew my developer account.
I have added my credit card information and submitted to Apple Online.
But apple says:


  We have received your purchase request for Enrollment ID;
  however, your credit card number is not supported by our automated
  order system.
  
  You can either submit a new order online using a different credit card
  or complete the enclosed purchase form and fax it to us.


But I am not finding anywhere on the portal or their website the referenced form.
Can anyone please help me with this? Where can I obtain that form?
This issue is specific to your credit card details and Apple Developer Program Membership, and as such, may require an Apple Representative to investigate on your behalf. 

The "purchase form" may be attached to a notification email that you have been sent from Developer Relations as a PDF, which can be printed off and faxed accordingly.

If you are unsure of where this form is, or have any other queries about your renewal, I would suggest that you visit the Contact section of the Apple Developer website and click on the Apple Developer Program Support link underneath the Enrollment and Account heading to get in touch with a Representative.