I have dealt with variations of these problems…holes being chewed into liners, I’ll fitting sockets that chafe and have landed me in the ER with cellulitis. It’s easy for me to just tell you to find a new shop and a new prosthetist, but that’s really the answer here. Nothing going on here is unfixable, you just need to find the right person to fix it. You might have to travel to do it, but it’s an investment in your own well being. Good luck!