I would need more information to answer and the question is somewhat confusing. However, it appears you have good grounds to vacate a judgment that was entered against you when you have had no service of process, and not part of the contract that was the basis of the lawsuit. If this is the case, you should consult with an experienced attorney in your area.
You were required to be served with the lawsuit. The Florida Rules of Civil Procedure set forth the requirements to vacate but you would also want a stay of execution pending resolution of this issue which may have to be done through an evidentiary hearing. Consult an attorney.