Take the balance transfer
If your negotiation tactics fail it might be time for you to consider the balance transfer option. You open a new account with a different credit card provider and transfer your entire outstanding balance to it.
In a way, a balance transfer can be a better option than merely reducing your interest rate, as you can make full use of the introductory zero-interest period, which can be six to 18 months long. However, use this time to pay off as much of your balance as possible and reduce your overall debt burden or you could be back in the same boat a year later and no better off.