Ouch! I do understand and it isn't something you can replace. The following places/programs 'may' be able to help you. However, there no guarantees. Once stuff is deleted on a phone, it is hit or miss with finding any of it again. If you are lucky enough to recover any of it, I would really suggest moving them off of the phone onto say a computer or cloud account. This way it isn't so easily lost. You may want to do this with any sounds, photos, videos, music, etc.
There are a few apps/programs out there that 'may' be able to help you recover the data.
A few of the programs you could try would be... DiskDigger, MobiSaver, Android-Recovery and Tenorshare. They are all data recovery apps/programs. There are many others out there, so check around and see which you would rather try.
One important note though, most of these programs are not free. They may say they are "free" or have "Free Trials" and "Free Downloads". Yet to actually recover your data, and get your files back, you may be have to purchase the program/app. Just so you know.