Ok there's actually a simple solution to this problem. Since you already have a PayPal account and you want to purchase Dark Avatar it does ask you to pay for DA by Credit Card as a default (which a lot of online distributors are limited to also), BUT, if you have a bank account also associated with your PayPal account you can add funds to your PayPal balance - or - just pay a friend to send you PayPal funds and this way you will have a balance on your PayPal account, as long as you have enough funds in the balance the money will be deducted from that balance rather than taking the money off of your credit card, it will just require that you use the credit card so that there is a back up source for funding. Again, as long as the funds are in your PayPal account it will be deducted from your balance first and won't touch your Credit Card. You must have used a credit card to create the PayPal account in the first place so it shouldn't be a problem as long as you can add funds to your account (remember, you can get a friend or family member that also has PayPal to send you some funds through PayPal and then just pay them back in cash). Hopefully I've explained this clearly enough, but this way any other people that have the same problem will now have a viable solution and will also be able to purchase and download DA online if they also have the same problem using a credit card through PayPal.

Cheers!