Worst glassclaim experience

I must say I am highly disappointed with the service of this company. If I had a choice I won’t have chosen this company to handle my claims. For something as simple as replacing a windscreen it is a hassle. So CIB appointed some company I don’t know DGC Glass to do a glass replacement. I had paid deposit. On the day they were supposed to replace the glass they said the one they ordered from the OEM had a scratch and they would like to replace the next day. The next day they arrive, they install a generic without informing me or even asking me if it was ok. CIB always used to ask me which PG glass I am close to and PG glass always did it right with installing the OEM glass. Now I am getting these back and forth email of no one taking accountability to replace the **** glass I never asked for and accepted. If this is a way for CB to save money it does not make any sense as I paid the same deposit I used to pay at PG glass. Can CIB get this DCG glass company to replace the windscreen as per OEMs spec or get the refund from DCG glass so I can get a better service with PG glass please. I also need to mention that Larvina Parsard also was of no help. He/she initially stated that if my car is out warranty I must use generic, and when I send my warranty details she never responded to my emails thereafter. Please do assist with this matter as I will escalate to my company should nothing be done as I never approved the installation