Really hope i don't offend anyone by saying this, but this is one of the reasons i find it so unprofessional to be ordering hair from one-man-band suppliers on Facebook. There are plenty of legitimate suppliers who trade in the correct manner, with a website and sales support team who are contactable in the correct ways i.e. telephone, website and email. It makes me cringe when people order hair via a text message or Facebook message. Just my opinion of course
Anyway to solve your problem, have you any other more reliable suppliers you could use for this lady rather than having to let her down and re-arrange? what product and colour was it that you were needing? I'm sure some people could suggest an alternative supplier for you x