Lame Week

So recenty I haven't been riding :-( and just taking care of my boys left hoof. He has been lame on it for the past 2 weeks.
What happened was that my boy threw his shoe (he was a week over due ) and my farrier came out the next day to do all his feet and put the shoe back on the left hoof. When he lost the shoe, I checked his left hoof and it was fine, he even was walking on it fine!
The next day I got a call from the farrier saying how he worked on all 3 feet and saved the left one for last, so he started working on it and his left hoof started bleeding!! He wrapped him up and put him back in his stall. He told me Apollo must of lost some hoof when he kicked off his own shoe.When we got off the phone the first thought that came into my head was " What the hell?! Seriously, shouldn't of he known?! He is a farrier, this is HIS job after all.." When he threw the shoe, he was fine! I truly think the farrier should of known that he lost some hoof and was thin soled! I am so disappointed and am considering switching to another farrier.
I don't even know what to do, whether I should pay him or not. I probably will but I surely do not want to.
My boy has healed up pretty well but I am still not riding him and he is still stuck in his stall :-(. He still needs a little more healing to go, but I am thinking by the end of this week, I can get back on his back!! :-D !!!!!
I will be taking advantage of his time off to try and find another farrier.