My Developer Account cannot be activated because I used a relative's credit card

Solution 1:

From the iOS Developer Program Support:

If I enroll as an Individual in the Standard program can I use someone else’s credit card to purchase the Program?

The billing information provided for the purchase must exactly match the Program enrollment information. If this information does not match your enrollment will be delayed and you will be asked to provide a notarized copy of a government issued identification.

I would contact support and ask them what to do next.

Solution 2:

I have used other individual's credit cards for this purpose. You should have no problem after phoning Developer Support Hotline http://developer.apple.com/contact/phone.html

Occasionally it gets stuck for no apparent reason that Apple could explain. Happened to a client of mine yesterday. We phoned and all was made well in minutes.

Solution 3:

You will have to get in touch with Apple and perhaps they will ask your relative to call, because they will want to make sure that you didn't "steal" the credit card. Other than that, you're not "doomed" in any way.