Do you have a written lease? Your obligation is set by the written agreement, not by her desires after the fact. You are required to pay rent on the 15th, not the 10th. You set the AC to the level you want. Do not pay the extra $100/month that she wants. Stick to the terms of the lease. If she tries to evict you just be sure to find a tenant's attorney as soon as possible. When the law suit is filed you can pay the rent to the registry of the court and request a hearing to explain what the landlord is doing and why you do not owe any other money. The landlord made a bad deal and is stuck with it. If the landlord cuts of your power or locks you out or takes any such action you may be entitled to three months rent from the landlord.