Just to note, I've removed your email address from your posts so as to adhere to our Community Guidelines and for your own privacy. I'd be more than happy to help you here on the Community, but if you'd like to check out what support is available for your Dropbox plan, you can visit this page here.
Onto the issue you described, can you first let me know what the desktop app sync status is showing on your Laptop and your Desktop computers?
If your app is showing that it's "up to date" on both, can you just double check that the apps are both signed into the same account with the same email address?
Let me know what you find and we can go from there - thanks!
If you'd like to contact Support directly, then I'd suggest checking out this article to find out what kind of support is available to you depending on your current plan. However, I'd be more than happy to help you from here!
I'd suggest to first check your Deleted files page to see if you're able to locate and restore the file from there. If you're not able to locate the file there, I'd suggest doing a search of your account for the file name, which will show deleted files also at the bottom of the results list.