I am 57 and cannot afford a hairdresser at the moment.I have medium length course hair.I have been having foil tints (blonde streaks)-last one 4 weeks ago.My hair was originally jet black but now would be almost white.I want to do-it-myself until I am financially back on my feet.For the last two weeks I have been using one of those tints that cover up the parting.In fact the parting looks greyer than ever.I thought maybe I could buy a colour that would colour the lot brunette.What should I be looking for?Could you recommend a brand?I would really be grateful,as I look a mess and I am back at work on Monday!Thank you.