Credit cards: do you trust them?

Willpower. I know it can be hard sometimes but that is the key to using a credit card. Make it work for you, that's what I tell people (i work in a bank). Use it for emergencies, make the most of the interest free period, put some money to one side when you know you have used it or better still, pay it off as soon as you get the bill. And remember, you can say "No", they were just doing their job when they asked you about the card-you allowed yourself to be "cajoled" into it. If you really are not happy then cancel the card, simple.