How to handle conflicts with inventorship on a patent with my supervisors from the university and the company?
I suggest discussing the matter with the technology transfer office and asking them how to proceed.

They have expertise in patent applications, and should be able to advise you. If you can say "The technology transfer office says..." it may reduce pressure on you when talking to the supervisors.

At the best, the advisors know better than to expect to be on a patent without an intellectual contribution to the invention, and would have assumed you had only listed them to get their input on the application.