I had a horrid time building a home with Keller Ho...

I had a horrid time building a home with Keller Homes.Right from writing the contract till closing.Firstly the sales team would hide a lot of information till they get your contract signed.15 days after signing the contract I was asked to add the patio roof which was costing me around $15,000.I said that it is something that I don't desire .They mentioned that it was the property developer's requirements.I was in a limbo.Why was this not mentioned at the time of signing the final contract?I was left with no option but to sign the amended contract after all the time and energy that I had invested..As a reputed builder keller should learn to honor contracts.Apparently Keller does this more often as compared to the other builders.Just wanted others to be aware of what's going on.Just because it's a seller's market they think they can dictate terms and conditions.