My two tortoises have a very bumpy jaw. One of the tortoises has a under bite, this is very hard to explain. The over one has a lumpy jaw and the top and bottom jaw doesn't match up.
Vets can take care of problems like yours. When your tortoises have had their problems corrected, they will be much healthier because eating will be easier.
It's best if you can find a vet who has dealt with tortoises before, but any vet is better than no vet.