My adviser does not write me a letter of recommendation, although he has said before that he would do it

I am currently a M.Sc. student and I was planning to apply for PhD programs. I asked my adviser to write me a letter of recommendation two months ago, and he agreed to do that. However, now that the deadlines are approaching (in 2 days) he has refused to write a letter, and basically he says that he wants me to stay in his research group and do a PhD under his supervision. In other words, he is forcing me to stay in my current school. I have been rejected from one of the PhD programs that I had previously applied, because he did not submit the letter of recommendation.

My first question is: what should I do? I do not want to create conflict, because he is my adviser and I need to defend my thesis in peace in the next two months.

My second question: If I do not send a letter of recommendation from my adviser, will it affect the decision of admission committee?

This is a time-sensitive manner and I really appreciate it if you could give me some insights, I am absolutely stuck here.