Windscreen - still waiting

I logged an insurance claim for a windscreen on the 4th March 2021 with Autoboys and I am still waiting for the installation. First had challenges with loading of photos on their application, then I had challenges with getting hold of them as they only have one number and when their telephone mailbox is full then that is the message you get after holding on "mailbox is full" Then they booked an installation date but not with me. Then they quoted a ridiculous excess amount which was incorrect as I have excess sure with insurance. Then they cancelled my claim without even calling me and I had to start the process again. Guess what, history repeating itself. Provisional booking logged on their activity log but no call to me and again the excess is incorrect. And now I play the waiting game again - was told manager would call me back this morning