CGC Grading Company Lost my cards!!

Back in July 2025 I submitted over 400 cards to Certified Collectibles Group also known as CGC Grading company at The National Sports Cards Convention. At the time I had submitted TWO orders. The first order contained over 400 cards and the second order contained 70 cards total. Within couple of months, I did received my 2nd order with 70 cards graded no problem. But at the time I thought the first order would take longer since it was a bigger order with over 400 cards. So I decided to contact CGC around November 2025 and check on my status of the first order. I gave a representative my submission number and she told me that they don’t have the submission order number? Since then, I had spoken to several other representatives over at the CGC and none of them seem to know what happened to my cards. The first representative had told me that they even order a video footage from the National and see if they can track it. I then waited few more weeks and then reached out to CGC again, and they told me that they had a video footage of me dropping off the second order but had no footage of me dropped off the first order that contained over 400 cards. At this point I still tried to contact them by phone and tried to reach out to the management but they kept dodging my calls. The reason I’m posting this is that I want to know if this incident has happened to anyone else here. If so, please reach out to me or reply to this post. Thank you.