******** and dishonest behaviour from discovery

Super disappointed with the service and the dishonesty I received with discovery, all this after moving my health, car, household and business insurance to them. I drive an Audi and had a stop chip that cause the front windshield to crack. I submitted a claim (claim number:***) and they authorised a change of windshield, took the car in and the windshield was change, but I noticed that there was a blue haze and I has to squint to see proper as I drive. Upon investigation I found out they authorised aftermarket glass and not the original Oem windscreen. Only after complaining am I told I need a letter from Audi saying they should install the original glass. When I went to talk to the managers at Audi they tell me that if I had kept or rather keep the aftermarket windshield I would have/ will voided/void the warranty on the rain sensors. My car has a warranty until 2024 or 100000km and I’m only on 30000km and all replacement part should be original. Discovery had all these details and still choose not to tell me, on top of that only when I complain do they tell me of a letter, and if I had kept quiet I would have voided my warranty. This is such dishonest and ******** behaviour and even as is they have not approved the change to original, they have “escalated “ to the “relevant “ manager to authorisation. I’m so disappointed and disgusted at the hidden dishonesty to save a buck on a loyal client.