Yes, right. I had wipe my memory. But after that i never use this phone. So i think it is the chance.
There is definetely a chance. Files aren't completely removed from the storage until they are overwritten by new files.
Its just very important that you make a correct image of your phone.
So you can try to recover those files on an image without hurting the storage of your phone.
You should make sure that your mobile won't be auto-updating any applications or whatsoever.
Just turn it on, activae USB-debugging, make an image, copy that image and load this image into your recovery software.
Chances are pretty high you will be successfull.
The wallet/app was stored on your internal storage, right?