The best thing to do when your hair is damaged beyond repair is try to repair the cuticle, baby it, no heating products as they will further damage your already fragile hair, try a keratin conditioner, vitamin e/prenatal vitamins (but do not over do, use by the recommended dose), olive oil conditioning treatments, use a good leave-in conditioner, get the ends trimmed. Do a deep conditioner treatment at least once a week – use a shower cap over the conditioner and sit under a dryer, do not apply any direct heat to your hair.
Here are a few good things you can use: Olive oil, it’s very good for your hair. Avocado – it has a lot of moisturizing properties for your hair cuticle, Mayonnaise is good to hydrate your hair as well. You can try a honey and olive oil hair mask – you can add some essential oils like a few drops of eucalyptus/mint/rosemary/or whatever you like that smells good to you. Or, you can try an avocado and mayonnaise hair mask – very hydrating as well.
Hope this helps. Good luck.