you need to use your own cc with adwords first, activate everything and ensure it's working. Get a voucher if you don't want to spend anything
Get your ads up and running, then suddenly after it's running, change the cc and add the cpc limit to the max possible.
You will need them to approve your ads on a legit cc and account...continue with that ads on the fake cc... It will be better if you adwords account is a aged account-to avoid raising unnecesssary flags.