Legal contract advice need help please

ok so I am a contractor for a company that teaches gun classes. I signed a no compete clause saying if I left his company at any time I would not compete with him for a year. There was no price listed on the contract. We discussed a price with a couple of other people as well who also became contractors. The first 3 months I worked with him he paid me the agreed upon price per student. Now he wants to pay me by the hour which would pay me much less than what I am currently making. From my limited understanding of the law him and I have a verbal contract in the state of Wisconsin on the original price. Thoughts?