I run a small fitness studio, and have been sub-letting a room for use as a massage therapy. The therapist gave me 3 months notice she was leaving, but at the start of the last month, has left the building and not paid the month's rent that was due that day. We had a month by month contract, but she did give me 3 months notice via email (so written). Nothing was signed, but when I gave her the invoice for the upcoming month (two weeks prior) she said nothing about leaving early. Do I have a legal right to fight for the four weeks rent and last 3 months of electric under contract law? She also left the carpet in need of cleaning, as there is massage oil all over it. Can I get her to pay for cleaning it?