I eventually received a refund from Dell.  85 days after the ticket was opened. That's what Dell offers for next day on site service apparently.  I am not impressed.
Issues with XPS 15 including hinge, trackpad and wifi. Waited 10 days for an unsuccessful on site repair.  And since then it has been sent to Dell and with them for over 3 weeks and no eta for return. I have had enough of this and demand a refund. So far Dell has refused this. This is terrible customer service from Dell.
XPS 15 9500 With Dell Over 3 Weeks - Refund Required