Signed up for the 10.00 auto pay and have a question.....

When I went to log in to my Uverse acct, I had an offer to sign up for auto pay for 10.00. I clicked on the link and signed up.

I should have read the terms prior because now I'm reading where you only qualify for the 10.00 reward if you use a banking acct or debit card for auto pay. I signed up with my usual credit card which is how I always pay this bill. Will I not qualify for the 10.00 reward now since I used the credit card? If not, how do I cancel autopay?

Thanks.

Term of the auto pay:

* Promotion card redemption via AT&T Reward Visa® Prepaid Card (Reward Card). Automatic Payments (AutoPay) Offer effective July 1, 2014‒June 30, 2015. Eligibility: $10 Reward Card to AT&T Mobility, AT&T U-verse, or AT&T Home Phone/Internet residential customers who enroll in AutoPay during offer effective dates for one or more AT&T accounts using a debit card or direct bank account draft. Limit of one $10 Reward Card for enrollment in AutoPay per account per 12-month period. AT&T employees excluded. AutoPay offer redemption details provided to customer by email within 8 weeks of activation of qualified enrollment. For redemption, customer must retain qualified enrollment in AutoPay for a minimum of 90 days from the time processing of reward is completed