Orange Poso Elephant Snail
Please note, if you want a perfect looking shell then these snails are not for you. These snails do climb up to the top of the tanks and dropping to the substrate, so shell damage is normal/
On the other hand, these damages on the snail's shell are part of the growing process, consider it like shredding process to grow. And the new shell will regrow.
The hole at the bottom of the snail are an indicator that the snail has just given/ or about to give birth to a baby snail.
As long as there is no hole that showing the snail's inner body then they are completely fine.