I had a client that cancelled her extension fitting twice in a row, less than 24hrs notice by text. I heard nothing from her from months and I didn't chase her as her reasoning was her dad had been taken ill. She's one of these that can never ring it all done by text or email. I ten get an email after 5 months asking for her deposit back or the hair. I explained to her if already bought the hair and had cut the tips back in prep, she then said actually she'd like to book in still, then I heard nothing. A couple of months later I posted "some" of the hair the her door explaining I didn't want the responsibility of holding her hair. Not heard since.
So tell her you've bought the hair, the £50 doesn't cover the cost of the hair, therefore you cannot refund. Do you know if she still wants it fitted?