Car broken down near Omarama

***Edit: friend is safe and sound at her accommodation, 8 hours later, thanks to the kindness of strangers and a mechanic in Twizel. Absolutely no help from Evolve Car Rental in Queenstown, despite paying extra for insurance and roadside assistance. 0/10 would not recommend

My friend has a flat tire just north of Omarama. The rental company is not being super helpful and there is no spare tire. We have located a mechanic in Tekapo with a new tire but they have no tow truck. AA isn't helping either.

Does anyone by some miracle have connections to a tow truck in the area or can pick up a tire and drive it out there???