Worst service ever!!

I submitted a claim and it was immediately approved by Alex Forbes. Contacted by PG glass and they scheduled a booking to have the windscreen replaced a few days later. On the day of the appointment I was contacted to say both fitters have called in sick. I gladly accepted another appointment. A week later they came through with the incorrect glass after I specifically requested the glass to be ordered from the car manufacturer. Still ok, let's get the correct glass and schedule another appointment. They took down the vin number and I was assured the correct glass will be aquired. A few weeks went by, excuse after excuse eg only got through to my voicemail, the fitters got lost on the way to you, we are busy with other clients, etc. Eventually they make their way back to me however again they come through with the incorrect glass! Now it's getting a bit ridiculous.. Only now do they realise that the glass needs to be ordered from the vehicle manufacturer. I contacted the vehicle manufacturer directly and they confirmed they have the glass in stock and can get it to me within 24 hours should I purchase from them directly but still delays from PG Glass. It's now over a month later..