It has been revealed that the human resources representative of the company resigned, and although my expected start date was May 22nd, the company (a restraint business) has no record of my employment or any related details. They contacted me to inquire if the previous HR person provided me with a start date. Deliberately, I responded negatively because I wanted them to assign me to another individual, giving me an opportunity to potentially renegotiate the terms of my employment, even though I didn't negotiate previously.
However, two weeks ago, I was informed that there would be no 401k contribution after a year and no paid time off (PTO). Can these two aspects be subject to negotiation? Perhaps not in their entirety, but is it possible to negotiate a contribution for the 401k at least? In the worst-case scenario where neither of these can be negotiated, would it be ethical for me to request a 10 percent increase in my salary?