That's awful, Oak. Hope you get redeemed completely.
One quick bit of advice: When making any online transactions - make sure the page you're on is secure. Sometimes you think you're on a secure website but in fact the DNS has been duped... check for the shttp:// before the address... if it's just http:// don't trust it.
As for the credit limit of the cards you use for online purchases... I agree 100% - keep it small!