I am sorry to have to tell you this but you need to bring the agreement to an attorney in your area to review on your behalf.  One has to be able to read the agreement in order to tell you how you need to proceed.  I can tell you some basics though.  A contract is considered something that is agreed upon between parties.  there needs to be mutual agreement and a "meeting of the minds."  The Courts assume that when parties sign agreements all the terms have been discussed and agreed upon.  Outside evidence or oral testimony (known as Parole evidence) is not generally taken in to account when a court goes about interpreting a contract in a lawsuit.  So if your agreement does not state what they are telling you, tell them to get an attorney and you will see them in court.  And you go get one too.  Good luck.