Likely your card agreement says you own the card. It should spell out that you can cancel it and why, specific reasons or for any reason. Then I'd do it. If the agreement doesn't say that, start working on the new draft after you suspend that card. Follow the golden rule here, he who has the gold, makes the rules.
My opinions are not necessarily my employers.
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell