Failed Service

I logged a windscreen claim with Miway insurance on the 29July2021 and on the 30th July they sent an authorization to Myglass (Burgersfort) and Myglaas are still failing to fit the windscreen for me, worse part I'm calling them every week where by they are always bringing useless excuses that they will order the glass or they haven't get the authorization from Miway. Today when I told them that I got a proof that Miway sent the authorization to you long ago. They don't know what else they can tell me. I decided to call Miway to change this authorization to PGglass and will be going to them now to get a better service.