Ten days to get some tour issue sticks? Come on, if that was a non-Mizuno male golfer on PGA tour they would have had a set in 2 days max.
They have fobbed her and the rep off and now it’s coming back to bite them for being on the wrong side of an equality argument.
I guess she would have wanted some time to get used to the clubs, so probably less than ten days, but you're right. Given Mizuno's preference for quiet word-of-mouth advocacy over paying $$$$$$ for player endorsement, this was
really inept PR, both in how the original judgement call was framed ("yes, we can do it but.." or "our team is totally tied up but we can put you in touch with...who can help" would have been far better than a blunt "sorry, no"), and then compounded by how the story was responded to. And communicating with the player via the dry official statement ("If the player in question would ever like to visit the Mizuno tour van in person for help with equipment, she would be very welcome.") rather than directly comes across as seriously tin-eared. Unforced error.