That is a tough situation. As dghii said, more info please. What happens, if anything when you try to open it?
Depending on what is wrong, maybe you can get it to operate enough to get it open.
If not, the 19mm bolts will have to come out, or the sockets will need to pop off (or be broken off).
Can you get more leverage to the 19mm bolts? How about reaching them with penetrating oil?
I expect that my video is redundant to what you already know, but just in case:
https://youtu.be/QOLhAR8bLio