You state that you had a 13-week contract. If you had a contract for a definite time, then you could typically not be terminated during that period except for "good cause" (e.g. insubordination, theft, absenteeism, etc.). Furthermore, you reasonably relied to your detriment on the promise of 13 weeks employment--the key elements of "promissory estoppel" (another legal basis for enforcing an agreement or promise) appear to be present in this case: a promise was made to you to induce you to do something detrimental (e.g. relocate), upon which promise you reasonably relied. Therefore, in this case, you may have a claim for the additional 12 weeks of pay based on either or both of breach of contract or promissory estoppel.