Don't expect the" landlord police" to magically appear and make him give you the keys. It just doesn't work like that.
As explained, this sure sounds like the agreed upon terms are trying to be altered. Are there terms in the signed agreement that allow the landlord to make changes?
People should never sign anything they can't agree to abide by......before agreeing, a conversation with an attorney may prove beneficial.
Is there a clause in the Lease that states that terms can be changed without any notice?
Do you have a years lease or a moth to month?
Check the statues in your State regarding Landlord Tenant Law.( Google it)
Send a certified letter with your demand ie ( I would like for you to comply with the lease that was signed by........... and deliver to me the keys to said property.............put address in blank space. Include the amount of money you paid to the Landlord ( deposit full month rent etc.
Start a file of all contact made by Landlord or contact you made to Landlord keep all receipts,voicemail,.Start communicating via email to get a paper trail. Keep any receipts of expenses you incur for housing while the landlord refuses to give you the key.
Contact Fair housing in your State this may be a case of Discrimination they will determine that.
DISCLAIMER I AM NOT AN ATTORNEY YOU MUST SEEK LEGAL ADVICE FROM A LICENSED ATTORNEY.
With that being said your outcome depends on the adherence to the law that is set for your State.
May GOD Bless you.