ONN TV Not responding to detective TV replacement San Jose CA

I purchased a Roku TV in December from Walmart. It has had problems since purchase. I have contacted Roku and problems continued. Finally, Roku had me contact ONN directly on May 31, 2023. I have been communicating with them via email since June 1, 2023 with Case # EU- 2056703. After several messages it was determined my TV needed to be replaced. I was finally able to submit the required information to validate my device met warranty requirements. I received an email confirming I met the warranty requirements and would receive email instructions for the replacement on June 16th. Then another email a few days later again requested information previously submitted and approved. I sent an email with copy of June 16th message and expressed my frustration about their communication. I then received the following email on June 21st from Martin Jones: Hello Linda, It's Martin from the onn. Customer Experience Team! I wanted to say a quick thank you for reaching out to us. We appreciate your time and patience, please accept our sincere apologies for the inconvenience caused. The replacement unit is the same model and due to the stock filling, there is a delay in the shipment. As per the update from the warehouse we should have the tracking details for the replacement unit by the end of this week. Please bear with us. There has been no communication since. I filed a complaint with the Better Business Bureau on June 28th and notified yesterday they got no response and closed case.