Legal Question in Landlord & Tenant Law in California

Chances are good that your lease has a provision that says you can't break the lease just because the unit isn't ready when planned. You are, however, entitled to a rent reduction on a per-day basis for the time you are not able to get in. Other than that, just keep bugging them about a move-in date. Eventually if the delay becomes unreasonable, you can break the lease and sue for damages. When that would be appropriate, however, depends on the terms of the agreement and details that would be too much to go into in this forum.