Beware, the client is not deleted. It has simply been moved to a hidden folder in your program files. Those 60gb still exist on your computer, taking up space while being completely useless.
You have to show your hidden folders in Program files , It will show you a folder called "Windowsapps". In Windowsapps, there will be a folder(s) marked with some numbers followed by "Oxyna". That is where your full game client is, totally unusable but totally taking up all the space on your computer.
You'll have to change the ownership on your Windowsapps access to yourself, and you'll have to do the same to the Oxyna folders before you can delete them and remove the full game client from your computer.
I feel like there should be a way to get compensation from a company when they fuck up people's computers this hard.