Warranty claim denied by Quantum Computing Holdings

I want to report a serious concern with Quantum Computing Holdings's gadget that I purchased on August 1, 2019 from your East Sarina, Texas store. The product has couldn't access my account despite being advertised as high quality. I've contacted customer service three times and spoken to Rosalee N., but my issue remains unresolved.

I want to report a serious concern with Quantum Computing Holdings's gadget that I purchased on August 1, 2019 from your East Sarina, Texas store. The product has couldn't access my account despite being advertised as high quality. I've contacted customer service three times and spoken to Rosalee N., but my issue remains unresolved.