I have some bad news for you. As when I used to work on the help desk and received many of those phone calls from frantic customers, once you delete those files, they are gone. Your only possible reprieve is if you have a restore point on your system that you could go back to and, crossing fingers, restore your system to that date. BUT!!!! before you do that, make a copy of all of your present data because anything that you have created after that restore date will no longer be there.
Once you are done, go out and purchase an external hard drive, or a second internal one, and copying all of your data there and do backups so that this will not happen again.
Use Microsoft Outlook PST Recovery Software software
which can help you to recover deleted or inaccessible Outlook PST files
data. The software also allows you to repair corrupt PST files without
tampering any data. Download the free trial version PST Email Converter Tool. For more information, visit: https://youtu.be/HdXRAx9o_ic