Unless a change of pay rate is prohibited by the terms of a union agreement or employment contract, violates company policy or is the result of actionabe discrimination, you have no legal recourse here. An employer has the right to change the terms of employment much as it sees fit; this includes decreases in pay.If you had relocated and then was then discharged, you might have a claim for something known as "detrimental reliance". But based on the limited facts presented it appears that would not be an appropriate remedy here.At this point. you can consult directly with an employment law attorney.