Basically, I want to purchase 2500 microsoft points to buy both of the cod: black ops map packs. But, it wont let me use either credit cards or PayPal. If i click on edit, it doesn't let me edit my credit cards and if i click purchase it says 'Credit card not valid' when it most obviously is. Then I click pay with PayPal and it doesnt give me the option to sign in with PayPal, the only option is to make a new PayPal account. This is ridiculous!