Welcome to NC missManda
A few things you can try:
sesame oil (very good for dry scalp and dandruff), fenugreek paste,
switching to a natural shampoo like soapnuts or neem powder (very cheap and they last for ages), unrefined shea butter,
unrefined mango butter,
honey mixed with olive oil,
banana mixed with avocado, olive oil and honey (blend well in an electric mixer, otherwise you'll have chunks of avocado and banana stuck in your hair).
I hope this helps.