Can’t sign up for service.

I tried signing up for Directv with internet service on the website and every time I try putting a debit or credit card it won’t take it. It lets me pick the package I would like to go into but when I get to the payment and click submit it comes back with an error message. Saying authorization decline validated please use a different card. It doesn’t take any payment method I try whether it’s a Mastercard, visa or discovered card. Customer service is no help. I kept getting the run around. I even went up to advance part same thing no help. To make matter worse now while trying to sign up it made dummy accounts even through none service was never created. Has anyone had this experience? Also how do I get in contact with corporate because no one will give an answer through customer service why this happening?