Hi @deeann84
Stubhub does not provide refunds. The only way to fix this is to sell the incorrect tickets (Stubhub will usually waive the sellers fee in such cases) and buy tickets for the date you do want to go to.
The same thing happened to me. Sure, I picked Wednesday's tickets order came after payment was made unable to change it after the order went through. The same seller has tickets in the same area, same row, and same seat that Wednesday but refuse to contact seller about mistake. Made me resell my tickets that bs . Then tell me they will be released to me Aug. 13th after 12:48 pm day of game