You are winner of the saw fly bug eating your leaves. Could also be worms. Check for worms and pick them of if you have them. What to do? You can try insecticidal soap which will harm the insects. It is recommended not to use insecticide products as you can kill off beneficial insects. To improve the looks you can trim off the heavily damaged leaves. Do not feel you are alone. Most have them. If you trim off the leaves destroy them.