How to stop a credit card company from suing you if you never had a credit from them nor ever used it?
No, you can not be sued for something that was not your responsibility under the law. But, you need to go and see someone soon about this. Is it possible that someone used your info to obtain the card? Then you have to deal with that ASAP.
If you are sure that you did not open the account ask for a copy of the original contract with your signature on it. The credit card company will have to provide it to you. Once you have it you can dispute the issue of the account. If you get sued it is known as an "affirmative defense" that you are not a proper party to the action and that it is not your signature on the account. But it would be best to deal with it before you get to court. Get help. Good luck.