No.

No, I have not agreed to work for you beyond the scope of this project.
No, I am not going to agree to a weekly meeting from now until the end of the year.
No, I am not responsible that your client just realized today (June 28) that there’s new legislation going into effect on July 1.
No, I am not willing to explain to the new project manager how the project is managed because the project manager is on vacation.
No, I am not employed by you.
No, you don’t get to tell me what to do.
No, I don’t have to do that, as I’ve fulfilled every obligation of our agreement.
No, I’m not responsible that you promised your client this feature will be online by the end of the week without talking to me first. I have delivered everything we agreed on, in the given timeframe.