Hello there (X),
Unfortunately if you uninstall the game this will also inadvertently reset all progress made within it (this also includes in-app purchases). As we don't have a users platform built for Hungry Shark Evolution this means we also don't have the ability to restore your lost progress from our end.
I assure you we are always striving for our users to have the best experience with our games. But please understand that at this time we are limited on resources and don't have a server in place to accommodate backups. This is something we have been exploring for our upcoming releases and are looking into implementing for the future so please bear with us.
If you require a refund for your purchases, please contact Microsoft directly as we do not have the authority to refund you here.
Yet again so sorry for the inconvenience caused towards your enjoyment of the game.