Persistent pain and earache could indicate a perforated ear drum or an infection and you should get a medical diagnosis.
For general earache, warm a teaspoon of olive oil and add to it 1 drop of lavender and 1 drop of chamomile ; blend well. Soak a piece of cotton wool in this and use it to plug the ear.
Also use the following oil to massage around the ear area, up the neck and across the cheekbone :
Chamomile 3 drops + Lavender 1 drop + Tea tree 1 drop – Diluted in 1 teaspoon of vegetable oil.