Advice for firing contractor?

[Simon Obas]

Greetings. Can anyone offer advice on how to properly fire a contractor? I hired a GC on Dec 7th with a job completion date of January 23rd. To date the project still isn’t complete. Every time I ask when will it be done, he gives me some BS answer and says just give me 2 more weeks. Last week he told me he “under bid” my project and he had to stop working on my home to take other jobs to have money to finish my home. He hasn’t to my house all week. I’m DONE! How do I get rid of this guy?