I've been working with a contractor on a T&M contract basis for a remodel project at my home in Walnut Creek, CA. Before starting the project and agreeing to T&M we asked the contractor to give us an estimate of timeline and total labor cost based on our scope of work. The contracotr indicated 8 weeks and 45-55k labor in an email. We're 5 weeks into our project and already at 48k labor (750 hours billed) and I don't see us finishing our scope anywhere near the communicated timeline or budget. I've already been paying a weekly accrual to the amount mentioned above, what are my rights to dispute what is happening?