NHTSA Complaint #11428536 — 2016 CADILLAC SRX

4 Mar 2021 passenger side front wheel bearing failed while returning home from anniversary trip with 37,733 miles on our SRX. Dealer stated that SRX was out of warranty due to time after purchase. 5 July 2021 passenger side rear wheel bearing failed while returning home from family trip with 40,003 miles on our SRX. Called Cadillac Customer Care and received a case number. Immediately received an email stating that she was my customer advocate and would get back to me within 3 working days (email is attached). NO ONE has ever contacted me. I have contacted CCC on four different occasions with a promise every time that someone would get back to me within 48-72 hours. NO RESPONSE. I have not been discourteous to any of the Customer Care personnel and therefore, have no idea of why they do not respond to me, even if it was a DENIAL. I get the impression that this problem may be greater than they want to acknowledge and they are hoping that I will just go away. I will not, this is more about principal at this point than money. Can you provide me guidance on what to do next, or can you assist in obtaining a response to my case?