Lieing to clients with poor service

No customer relationship, no honesty, poor service with no understanding. Took my vehical in on May 2022 for a warrenty related claim to CMH Umhlanga where my vehical was inspected by Kammy from warrenty department. All documents taken and in order to process the claim. I was asked to take the vehicle to a panel shop for a quote which was sent to them 2 days later. A week later I did not receive any feedback. I called Kammy and was told that they are extremely busy and was reassured that my claim will be processed that afternoon. 2 weeks later I called Kammy to follow up as I did not receive any feedback, I was told that my service manual book had pages missing, which does not come with this model type vehical. A week later after settling that this information requested by warrenty is not related to this vehicle I called Kammy again to find out on the progress, I was told that the warrenty consultant agent is on leave and will not be in for 2 weeks and there is only 1 agent for GM in the warrenty department . After much frustration I contacted Keeran from Stellantis to help resolve this issue as part of the complaint procedure. I was sent a copy of a opel car service manual and was requested to have the same documents for a Chevrolet utility bakkie. Which any person with knowledge will know that you can not expect 2 different vehicles and brands to have the same service manual. After 2 weeks and all the delay tactics I was requested to send proof of purchase for my vehicle, not sure what this will have to do with the rust on my vehicle. Today I received a mail from Kammy stating that they are changing systems for warrenty and will process the claim once they have the new system running and upload the pictures and report from the panel shop. Please CMH tell me where is the customer service in this matter. To date my vehicle is rusting with no way forward or repairs conducted.