Eyelashes have not returned, it’s been 3 years!

One thing I always liked about myself no matter what were my eyelashes, they were so naturally long and curly. I was pregnant and going on holidays with my toddler, and my friend recommended eyelash extensions. Said it would look like I was wearing makeup when I wouldn’t have time to do it. They were gorgeous, but I got conjunctivitis the next day probably from my toddler and then didn’t realise how annoying they would be when they were growing out. I wasn’t given any aftercare instructions so without realising I shouldn’t, I pulled them off as the extensions grew out and loosened. I ended up with shorter natural lashes after this but thought would be fine as they’d grow back. But it’s been 3 years now and they have still not returned to their former glory.
Does anyone know why they wouldn’t grow back to their former length? And does anyone know how I can get them to grow back to their former long length??
Please help :(