Many files not in cloud after removing & deleting client from former company's laptop

Hi this may be a popular question...

I was using the free version of Dropbox to back up content from a few years back...work related stuff from a long-ago job. Nothing proprietary, but important to me. My assumption is that this is a common problem and Dropbox has them backed up somewhere unless I inadvertently deleted them permanently. 

How can I determine if it's possible to get back the files that were lost? 

Sequence of events & unsuccessful strategies so far:

9 weeks ago, I left my last job and deleted all (everything) of the content from the Dropbox client from my work computer and then uninstalled the client. I ensured that all files were still in the cloud version of Dropbox before and after this procedure. 2 weeks ago, I installed the Dropbox client on my new computer and now hundreds (but not all) of my files are missing!

I looked at "Recent Activity" in the cloud version of my account and can see a record of where I apparently deleted these files on July 26th...I did many screen captures of the deleted items listed in the activity log (see screengrab below).

Using "Deleted Files" for any or all folders w missing content has resulted in nothing; there are no deleted files listed in the folder in general, regardless of the locations or dates selected.

Using "Rewind" also does not work because the folders cannot be rewound to July 26th, for whatever reason. I even started a trial of Dropbox Pro in order to see if I have the capability of rewinding my account to contain everything that was there on July 25th...that would be awesome! It did not work.

Thanks in advance!