Well I must admit even though your builder is being a bit slow they are still getting work done. In my project I went from a dig date of March 23 and NOTHING was done for two months. Needless to say my builder is now going out of business four months later and they only got to the steel portion of the build. I'm currently getting bids from other companys to finish but it's like trying to get your kid to eat liver.

I would suggest writing them a letter to complain formally and suggest to them that you will never give a recommendation to anyone. If they care about their reputation they will try to fix the situation, if they don't then live and let learn and tell everyone you know not to use them.

Eric