Advanced cylinder testing Failed to provide correct gas replacement certificates and plaques Lonsdale South Australia

Contacted buisness about replacing certificats and plaques for a gas car they did the work on so I can register it, paid their invoice for the work, waited 2 and a half weeks did not receive them, rang the buisness to follow up, was told he hadn't done it yet, was sent a photo of the certificates with only one tank serial number on it.

The car has two, the serial number an do date on certificate is incorrect, contacted business to tell them this, was hung up on, a week and a half later received letter in mail addressed to the rude customer, with only one plaque and certificate with only one serial number still with the incorrect dates and numbers on it, it's useless.

tried to contact buisness to get this fixed was mostly ignored before finally he agreed to replace but only if we pay him again was sent another invoice, and he refused to speak to me