Advice on split custody issue

Jennifer

Ok, so my ex and I have split custody. Week on week off. The girls wanted their ears pierced for Christmas, so I asked him if I could do it because they are under 18 and we are supposed to agree on things like that. Well he said no cause it will become infected. I said I would supply everything, and even come clean their ears nightly and he still said no. Said that I can't get their hair cut I can't take care of their ears. Well first, I didn't get their hair cut because his gf cut it and it was so uneven. I did take them to a salon and they said I'd have to let the shortest layer grow out to their shoulders to fix all the uneven cuts. So, here we stand. His gf cut their hair again! I'm pissed. What can I do about this?