$8,888 · shower stall door - repair or install another

House was built in 1988 and I think the shower stall is original. The entry door is not on hinges and is part of the frame. It's separating / splitting from the top 1/4 of the door. See pictures. Please call or text Philip if you can repair or know someone that can come up with a good fix or who can we call to install a new shower stall ? Thanks.