What to do if RunFlat kenna nail?

[kingfisher07]

Advise needed for a first time car owner. (few months old new ride)

First time driving run flats tyre and first time kenna nail in rear wheel on a Sat afternoon.

Promopted with a warning that rear wheel pressue is ZERO kPa when just entering expressway.

Drove to nearest petrol station to check if can repair but they say cannot as nail is near corner of sidewall.

Bec that petrol station has no run flats stock, I changed to a normal tyre.(so now 3 run flat and 1 normal)

Questions to seniors:

Q1) is it advisable when zero pressure to continue driving for another 20-40km on expressway to nearest workshop that has run flat stock?

Q2) from the photo, is it true cannot repair the run flat? (one photo is showing the tyre before dismantling, another showing the inside of the tyre)

Or maybe should just call CnC 24hr roadside assistance? (still within warranty with some service credits to spend(