I am a personal trainer contracted with a gym as an independent business owner. One of the stipulations of that contract was in the first few months I had to work X hours per week in exchange for not having to pay them the full rent. They wrote on the contract I only had to do 10 hours per week but told me when I started that I had to do 15 hours and it was a typo and I had no choice yet they did not change the contract. Now I have 3 months left on my contract and want to leave. I believe that due the above information that they have breached the contract and I should be able to leave without paying out the remainder of my contract. They say that it doesn't matter and I have to pay it in full. Is there a way I can use this to get out of the contract under contract law?