No response from store!

I had purchased a Hisense 55" ULED TV on 18/4/2018 from Dion wired in Gateway. I had subsequently noticed that the warranty sticker over the ***** hole was already perforated. I had contacted Hisense customer service regarding this and they had said that I need to inform the store so that it can be noted. I had sent this message to Nicolin (TV dept manager) via email and visited the store to inform them. When I visited I was given excuses that the salesman who sold it to me is not around and that no one else can help me. I have not received a reply from Nicolin to date. I find this very strange because when Dion Wired wanted my business they were quick to help but now that I need backup there is no one available to help. Please assist to have this issue resolved.

Regards Shekar Roopan