Legal validity of rental agreement without signature

[Srinivas Murthy]

I have signed an agreement with a Property management firm to rent my home out. I signed an agreement with them on general terms, but haven't signed a document that specifies rent and lease terms. Now the management company found a tenant, and signed a lease with him, without showing me the documents or the terms. I don't have a document that tells me what the rental amount is. I am asking them to back off from the deal and Management is asking me to talk to their legal counsel, they won't back off. What are my rights, given that I haven't signed a two party deal involving the potential tenant and myself.