Get in touch with your local Legal Aid society. they must have attorneys specializing in tenants' rights. Since you weren't informed when you moved in, it was not your fault. You might be entitled to compensation from the landlord that will allow you to move into a properly zoned building. Do not give up your rights. This should be your landlord's concern, first and foremost, and only secondarily yours. The landlord must provide habitable premises. Who knows, maybe the landlord would even have to reimburse you for the rent you paid the landlord for a unit that should not have been rented to you as an apartment.