This is why I always cut the food across the middle to check for raw parts, if it's raw I instantly look up the closest staff and ask them if they want to kill me.
THis happened to me at mcdonalds, and the staff just said it's no problem eating raw beef.
I asked them if they are willing to possibly pay for medecine or for grave funds the day I die if I were to because of them serving me raw food. (And yes I did insult them for this mistake)
They got pissed, I got even more pissed and asked them if they are so insane to serve me raw food, and threathned to take it to court.
Suffice to say, I got an new hamburger and 20 kr (swedish currency) as an sorry gift. I checked the new hamburger, and not only was it cooked and made to the extreme, they even threw in an second layer of beef, all of it was made perfectly with no signs of being raw.
To be honest, I just wanted an new hamburger. But since they insisted on giving me more than I paid for, I am not going to say no.
In short, never back down. IF the resturant is serious and wants to avoid bad PR reputation, they will serve you an new dish wich this time should hopefully be made without being raw.
However, if you do not check the beef/food before you eat, then it's way harder to claim that they intentionally did it raw or fucked up.
So have it as an thumb rule if you come out of this alive. NEVER EVER eat beef/chicken/fish before cutting it open.
If you get an beef for hamburger, do not cut across it like this. (|) Seen from the top, this will not open it up enough for you to check if it's raw.
Cut it like this: [-----] seen from the side, that way, you will cover it more and see more if it's raw or not.
Also to be on the safe side, if you go to an more luxury looking resturant, never ever accept anything at medium-rare or below. Take higher than that since medium-rare is an small bit of rawness in it, to be on the safe side.