Misleading Advertising + Refusal to Refund + Hostile Customer TreatmentI subscribed to Perplexity AI's Pro service primarily for access to GPT-4 Turbo, which was prominently advertised as a key feature at the time. I was so excited to use it along with Perplexity's grounded responses to help me with my research and my tutoring work at the time. After my subscription began, Perplexity removed GPT-4 Turbo from the service while continuing to advertise its availability.When I politely requested a refund for the unused portion of my subscription, citing that the service no longer provided what was advertised, I was met with dismissive and hostile responses. My concerns were not only ignored but also ridiculed. The company directed me to a generic refund policy that doesn't address changes to advertised features. Key issues:1. Removal of advertised feature (GPT-4 Turbo) after subscription purchase2. Continued advertising of the removed feature3. Refusal to provide a refund or adequately address the concern4. Hostile and dismissive customer service responses5. Ridicule and mockery when requesting clarification or expressing dissatisfaction6. Spreading of misinformation about AI models to justify their actionsThe responses I received when seeking resolution were shockingly unprofessional. I was mocked for advocating for myself and met with aggressive dismissal of my valid concerns. This treatment goes beyond poor customer service and enters the realm of customer hostility.I strongly advise potential customers to be extremely cautious and thoroughly verify what features are actually available before subscribing. Moreover, be prepared for potentially hostile treatment if you have any issues with the service.This experience has not only eroded my trust in Perplexity AI's business practices but also left me feeling disrespected and devalued as a customer.