Hair disaster a few months before the wedding help plz!!

So did the second stylist say he could color it brown if you came back? I would go back to him if you were comfortable, or look for a new colorist who is a Master Certified Redken Colorist. This should be possible, and you've got time before the wedding. I think stripping most of the black would be the hard part, and you've done that!

I would go back to him, it's very hard to go from dark to light so it will take time to correct.

Holy run on sentence. Your post was extremely difficult to read, but I think I get the gist.

If you're worried about the orangeness in the short term you can try toning shampoo/conditioners. You can try something like this-
https://www.amazon.com/Joico-Color-Balance-Shampoo-Conditioner/dp/B017V5GPOQ/ref=sr_1_6_s_it?s=beauty&ie=UTF8&qid=1522844494&sr=1-6&keywords=blue+shampoo

The more you wash your hair the more the color will release. Hot water, sunshine, chlorine will all naturally brighten your hair, if that is a concern.

Of course he won't do it for free, there is no error. He stripped the black from your hair like you asked and toned it like you asked. The fact that it's still brassy is not an error on his part, it's due to the fact your hair has been highlighted, stripped and dyed multiple times. Hair doesn't just magically become the color you want, it's fickle and depends on it's health, the environment and your hair washing/conditioning routine. I agree with PP to try out a toner shampoo to work on slowly and SAFELY removing some of the brassiness. Then go back to the 2nd stylist and have him dye it for you like he said he would.

I think the second colorist did the best he could with what he had to work with. Lightening hair is a multi-appointment process. Your hair doesn't look orange it looks coppery-brown probably the best he could do when stripping it from black. You can't lighten your hair too much all at once since the bleach will kill your hair and will leave it damaged and brittle.

I would go back to him and allow him to continue working on it. He didn't make any errors so I certainly wouldn't expect him to do it for free.

I dyed my very light blonde hair a very deep brown (near the roots mostly as I had a balayage) nearly 3 years ago. I'm still trying to slowly strip it out. It is definitely not brown anymore but, it is a darker blonde than the rest of my hair, my stylist and I slowly work at stripping the color and working to blend it in naturally to the rest of my hair. The only way to get rid of it quickly would be to chop my mid-back length hair into a shoulder-length bob which I'm not willing to do. It's not always easy to fix color mistakes.