I have a credit card through a company which I believe is engaged in unethical practices and I no longer wish to have a card with them. Their APR is 29.99%. I currently have a $0 balance and I am wondering if anyone can advise me on what my best options are that will prevent anything negative happening on my credit score. My problem is this is my longest held credit card (just under 10 years). Is it best that I just leave the card open and not use it? Should I close it and open a new one with other company? Should I wait until they close it for inactivity? I'm clueless. Any advice?