Hi, I'm the new seller on Amazon Canada and I send my first shipment to Amazon warehouse in Canada on May 09, 2023 that content 5 SKU with 35 units in total. I did a mistake because there are 1 SKU (10 units) of 1 products that doesn't need to label by me, that is what the system said to me and I took the picture of my Laptop screen as a evidence. I send this parcel to Amazon through UPS, 2 weeks later they receive it and confirm that they receive all the units that I sent. But 2 days later they change the status, they said they receive only 25 units (4SKU) only and there are 10 units that are receiving. I have been waiting over a month, until the shipment was close, then they said they didn't receive it at all. I try to ask them to investigate but they don't allow me to do that. They keep saying the "Investigation completed – shipment contents counted and confirmed" but I lost all the 10 units. And they even don't let me send them the evidence. I can even prove by showing them the weight of my package, without that 10 units, it can be that heavy. So they are stealing my products, what should I do now? Please give me some advice! Thank you!