Urgent advice needed please!

         I have finally had enough with my hair it is half way down my back which is naturally curly. I have been having bleach highlights for about ten years now. Basically due to having no spare money to spend at the hairdressers, I need to find a fix for my roots which are about 4 inches long now which means I cant have my hair down because its two tone, medium/dark brown at the top then blonde.

 

My question is can I get a permanent blonde colouring from the shop to put on myself? So then I can just keep putting a bottle on when I need it.

 

Or can I dye my hair back to the brown colour that it once was?

 

I can email a picture of how bad it actually is...