I'm sorry to learn of your troubles in getting your website completed. Sometimes when web projects go awry it's because there is no plan to keep them on track.

I would suggest having a straight-forward conversation with the developers, letting them know that you are absolutely unhappy and that you are considering your alternatives. You can express to them that while you really want to finish the project with them, you have a business to run too. Suggest that you work together to develop a project completion plan and set a date that the website will actually get done--and create a penalty for them if they don't complete it in the time specified. Make sure the final payment is in some way linked to your receipt of all their work and the web files they developed for you.

I would also start working on your plan B. What is the worst case scenario? Figure out what that is and then prepare for it. There's nothing worse than being in a bad situation and not having an escape route.

In the future, when using offshore development teams, make sure someone is nearshore to manage the project.

Best of luck!