For acne apply peppermint oil it is antifungal apply daily night before going to bed it heals and reduces the acne I do use Anveya peppermint oil it is organic one

Use mamaearth tea tree face wash. Its very effective for oily skin and reduces acne and pimples. Its natural and free from toxins.

Vo abi teenage h ,I suggest avoid junk food oily food and put fresh aloevera gel on face 10 minutes

This is just the beginning of teenage years. Ask her to cut down on junk, oily food and increase her water intake. Teach her to skin care routine. CTM works really well for all kind of skin . I would suggest her to use Bioderma micellar water to clean the face and apply fresh aloe vera gel. Ask her not to use any chemical loaded beauty products

You can try double cleansing.. cleanse first with cleansing milk and cotton and then with a facewash every night. Also ask her to put multani mitti and rosewater facepack every week. Drink lots of water too.