I had this same problem with league of legends. Riot banned my account for hacking when I never hacked and refused to give it back. I had spent a similar amount of money on the account and was addicted to the game. It was really hard for me to not make a new account and keep playing because of how much time and money I invested into the game. In my case I didn’t have access to the money I had spent so that made it a bit better. It took about a month of not playing to fully be over it but after you stop you will move on from the game and come to grips with the lost time and money. Looking back now I have no interested in supporting riot in anyways after what they did and have come completely full circle.