That's really bad luck, so sorry
I've had one or two keep getting stuck - there was one lamb last year who I had to rescue no less than 12 times in one week, and twice it was in pitch black
and another ewe lamb who kept doing a repeat scenario but not quite as often! Not had any injuries but I can see how it could easily happen - the ewe I found was quite stressed on one occasion and had totally churned up the area around her by her frantic scrabbling.