Undecided Question

Remedies for VERY VERY dry face skin?

hello, im a teenage girl and instead of oily skin and acne i have very dry flaky skin on my face. around my nose, cheeks, around the mouth, eyebrows and cheeks. right now im using Avon Care Dry Skin SOS. it doesn't seem to be working at all. i have tried many moisturisers and i have had no luck so far. i need something quite cheap and something that i can purchase in the uk. any recommendations?