@Employee24,
I am sorry you're dealing with such a shady company.
Hopefully you have a copy of the "contract for reasonable deliverables" - if not, let them give you a copy. Then document everything they say or do to create a hostile work environment for you. The more you can document the better.
Do not resign, let them terminate and they have to give you a valid reason.
Don't worry, you'll get unemployment payments. The burden of proof is on them to have valid documents that you were unwilling to do your job. If you simply cannot perform the tasks they've given you now, that's not a valid reason for termination.
Again, write down everything and document the date and hours. The labor board wants to see all these things. Do not sign anything, but duly note on your documentation that HR tried to coerce you into signing a new contract that will be renewed every two weeks. Also document that the given tasks are beyond your scope of work and beyond the time given to you. Intimidation and a hostile work environment, bullying and making you feel uncomfortable are all grounds for legal suit, but you need to document everything and I cannot stress it enough - do your due diligence and write down everything!
Good luck and whatever you do, don't resign!