I have to start off by telling you that I am not an attorney, so I can't address the legal aspects to your question. However, there are some givens:
1.) Your lease stipulates the agreement you have with your landlord and what they can and can't do in terms of rental fees and charges. If you signed an agreement for x dollars per month over a period of time, say 12 months, that landlord cannot arbitrarily increase or change the terms unless they are empowered by your contract to do so, or you agree to it in writing. Check that fine print.
2.) A rental unit must be fit to live in; that is, it must be habitable. In legal terms, "habitable" means that the rental unit is fit for occupation by human beings and that it substantially complies with state and local building and health codes that materially affect tenants' health and safety. I would challenge your landlord about the termites.
Check out this link for more information. This section discusses these and other possible issues and problems in the landlord-tenant relationship: http://www.dca.ca.gov/publications/landlordbook/problems.shtml
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