First off they should have talked to a job reference before you got hired on. Secondly there are rules as to what they can say. Basically they can only answer yes or no questions regarding your employment with them and most are about how long you worked there.
If you lied about being employed longer than you were there may be an issue, but if you were truthful then they are either lying to you, or your former employee lied.
You are within the 90 day period but they can't change your hire on pay. Do you have anything in writing? It sounds fishy to me, and I would get with unemployment or contact a lawyer.





