The number on your Battle.net account is showing as a landline which won't work. You must have used another phone number then. As I can't ask for that in here and you should NOT post it, I'm afraid I'll have to recommend calling in and talking to our Billing department.
Billing representatives are on hand to take your call between 7am to 8pm Pacific Time, 7 days a week at 1-800-59-BLIZZARD (1-800-592-5499). Customers in Australia should call 1-800-041-378.
It needs to be a cellular number with a data plan.
Customer Support Representative
Threats of violence. We take these seriously and will alert the proper authorities.
Posts containing personal information about other players. This includes physical addresses, e-mail addresses, phone numbers, and inappropriate photos and/or videos.
Harassing or discriminatory language. This will not be tolerated.