Ignore and block these calls. If you were the subject of a pending civil lawsuit, you'd have received a letter from the attorney for the other party. You'd have a paper trail.
Then, if a case was filed, you'd have received a summons delivered to you by someone licensed to serve process in your locality. You would NOT have first heard about any civil law case from some scammery-scummery debt collector who cold calls you and starts demanding money.
You can check this out yourself by simply going down to the local main civil court and checking the defendants civil list. The court clerks are usually glad to help and are familiar with these kinds of scams.
Same debt collector calls me today. Civil law suit filed against me for a Capital One Visa credit card that went to collection. Funny thing is, I have never had a capital one visa card, EVER, plus, buying a home right now, I know exactly what is on my credit score and don't have ANYTHING on my credit report that caused me not to be approved so there again, another reason I know that this is a scam. So to play with them I asked them how to resolve the issue, and they said, of course, to pay the debt in full. I said OK, HOW? "You can pay by credit card over the phone or gift cards." Ummmm, no! SO, I told them if I may get their address, I can mail them a check in the mail. "CLICK".. I was hung up on! LMBO!