Construction projects are bound to have some hiccups as they proceed. When anything amiss happens, your contractor should alert you to the issue and find ways to overcome the problems. The real issue comes in when they aren't willing to do this. In these cases, you might have to turn to legal remedies to rectify the situation.
You might feel as though you aren't being heard when you speak to the contractor. Sometimes, they will try to overpower the client by reinforcing what they think about the issues. When this happens, it might be best to take a step back and review what is going on. If you think that you can get the contractor to see your side of the issue, you might try to approach it again. If you don't think it will work, it might be time to call in reinforcements.