Ok it appears you will need to call swtor to get this resolved, i would ascertain why the payment failures occurred so it doesn't re-occur if it was my card.
I can say there was no billing errors on that day , and swtor does not ban accounts for payment failures, EA and swtor however do not muck around with about chargebacks.
That is incorrect, they do ban accounts for payment failures. "We have now completed our investigation into your query and upon review of your case, we can see that your account was disabled due to a transaction blocked for security reasons."
And as a bonus if they restore your account they'll steal anything you've purchased recently even if it was a successful payment through a legitimately purchased gift card.
