So I had my hair dyed dark brown but for some reason the roots were to light. So she put color back on again an back under the dryer . Since then I notice my hair is very then at roots with no body lying flat and thin on my head. when its wet brushing it is like brushing ruber bands at the ends, what can I do ? I need help ! Feel like she melted it.:/ if it matters I'm 42 with some gray at roots I probably dye it every 2 months.

Did you have this done in a salon? Sounds like she messed up a bit. I wouldn't dye it at all for as long as you can stand it because it sounds very weak, that's why its stretchy. Be careful brushing, try not to brush it at all when its wet as it will snap

I Agree with above, maybe on combe your hair with conditioner in it.
Did you know what kind of colour she used? This is so odd that she heated your hair while you were colouring darker.

If I were you (if you know its permanant) I would go to a pricleline get a MYHD hair Colour Remover and try to get rid of the colour, and if you want to be a really dark brown almost black I woulf buy and number 3 hair colour with a 20 vol do your hair yourself, this colour is a great conditioner for your hair. Good luck