I had 3 25 dollar prepaid mastercard cards. I added 1 for a black ops map pack and spent the rest on smaller things. I tried adding 2 more to buy more microsoft points for GTA IV download. "Your payment instrument could not be authorized. Please contact your provider, or try a different payment option."g This message pops up when i try to buy more. i had no trouble with the first one. i also keep checking my billing information and it charged 1.00 about 5 times and it said from Billing Information. Can you please help me solve my problem and figure out where my money went. I have about 19.00 on one of my cards that i didnt even use yet.