APPALLING SERVICE FROM PG GLASS

My insurer appointed PG Glass on 07 Dec 2023 to replace the windshield on my vehicle. On 08 Dec 2023 I contacted them and requested that a fitment at my premises be done. They acknowledged that they would request their mobile branch closest to me to contact me. They sent me a SMS on 12 Dec 2023 to contact them and I phoned the number provided by PG Glass multiple times without it being answered. Earlier today I escalated the matter with my insurer, who contacted PG Glass in a conference call and the PG Glass head office employee committed to they attending to matter during today. A short while ago I received a call from the mobile unit branch who advised me they can only attend to my claim next week, because they have to order the glass and I have to continue to drive my vehicle in the state it is. How in this modern day and age is it possible that a reputable supplier like PG Glass do not have stock of a common vehicle windshield and have not ordered it at the stage when the claim was awarded to them a week ago? Absolutely appalling and the most unprofessional customer experience I've had in a long while!!!