Personally I would not want to move into a place where the landlord started off in this manner. I would have concerns that they may be either bi-polar or simply irrational and unpredictable. I would also have concerns about their making me miserable while I was there and giving me a hard time when I was leaving. That said I would tell them flat out we have a signed contract, if you don't want me moving in that's your prerogative however I'm perfectly willing to have my attorney contact you and to enforce our signed lease unless your prepared to pay me to break the lease. I would want twice what I gave them and I would want it immediately.
Jon Schaffer, Property Manager/Realtor
All County Sterling Property Management
Office: 407-674-5601 Ext. 5 Fax: 407-674-5631
"The finest compliment I can receive is a referral"
After this if he still says no to you, may may hire an attorney and sue him for full amount, triple damages and descrimination.
If you have a lease signed by the owner I think you have a case. A lease is a contract and if signed by both parties should be binding on both parties. I would encourage you to talk to an attorney; many will give you a free initial consultation.
While you might not want to be somewhere you are not welcome, you also don't want to be treated unfairly. Depending on the reason given, you may have suffered some form of discrimination.