I have just rented a car from Pegasus Car Rentals Tauranga and Rotorua and it was an absolute nightmare. We got a puncture in Auckland on Saturday night and when we tried to contact them to get their permission to have it fixed they would not return my calls or emails. We were effectively stuck at Auckland Airport on Sunday with just a space saver tyre and no spare and no garages open. When I finally managed to contact the owner by going to the Auckland Pegasus Rentals he was abusive and told me to call back the next day as he didn't work on Sundays.
I believe this to be a direct breach of their terms and conditions which require you to contact them before having any repairs done.
This has to be the worst customer service I have ever experienced.