I've just gotten 6 pc Dental Bridge made, How long should it take, I'v!

I went to a new dentist about doing a new bridge. This is not my 1st bridge..but is the first time I have made 8 to10 visits for the same bridge. I had to pay for the bridge as I went along and it is now paid for.The permanent bridge has not yet been permanently fitted yet. I have had problems going Thur this bridge being built & fitted properly. I AM NOT HAPPY! When I was wearing the temporary I had a reaction to the cement or bond as some call it. My gums became red and inflamed and felt slimy. Then 1st permanent bridge was made incorrectly and some of the teeth were to big and some were to small and then some of the teeth were very small & to short, also the eye tooth and the front tooth next to eye tooth is so thick on the back side of teeth he says is for support and there is a gap between top of enamel and gum. Some teeth did not come up to the gum line, so then the next 2 or 3 times I went back the lab guy came up and made some adjustments to the bridge "i've never had to meet with the lab guy before" i thought it odd, maybe i'm wrong i don't know, but this is not my 1st bridge. I have told the dentist several times now that I'm not happy with the bridge or shortness of the teeth. The front tooth enamel does not come up far enough to the gum and there is a little dark colored line around top edge of tooth, showing where it does not fit up against the gum line, "maybe this is called the margin" i don't know, inside next to tongue on two teeth the enamel does not come up as far to the gum as I have had on my previous bridges. When I try to eat on that side my gums sorta feel as if they are getting raw and irritated. So I went back to dentist last week and he say my gums feel this way this time because the bridge is moving and he needs to do temporary re-cement again for another 30 days and then if gums are cleared up he will permanently cement the bridge in next time. What can i do? I have paid him almost $7000 and I just want to cry about this. Should I go to a few more dentist and ask their opinions? This guy has been a dentist for 28 years and is an implant Specialist. When I bring up an objection he say he been dentist 28 yrs and knows best. He is very very happy with the work he has done. I am NOT HAPPY! This is lot of money and once he cements the bridge in (its going to be there for long time). I don't know what to do. He is happy with his work and already has his money and if my gums are not red and inflamed he wants to permanently cement the bridge next month. What do I do? I didn't want the front tooth beside the eye tooth included in the bridge but he said it would be better to do the front tooth with the bridge to help make stronger. I wanted a single cap on the front tooth. I wanted it to look natural and I just want to cry and cry about it. What should I do before he cements this bridge in permanently? I am grinding my teeth and he has already made a mouth guard BUT I am still grinding my teeth and I am constantly pushing against this new bridge. Please some body help me go about this in the right direction before its to late. Thank you in advance.