Being roleblocked is part of the game. If they go out of their way to roleblock you as a way of harassing you or are actively gamethrowing by doing so, you can report them. However, neither was the case here. Breaking a rule because you don't like a mechanic being used on you isn't allowed. Your app...
In addition to the extensive history of leaving, it seems to also be an extensive history of leaving as certain roles predominantly, namely Mafia, Jailor and some NK roles. And even if giving you the benefit of the doubt, the history of leaving games prematurely is just way too much. I get it if you...
Your best bet is to e-mail the Devs with the purchase receipt from ToS (You can find your purchase history in Steam under Help > Steam Support), and ask them to change your e-mailaddress as well as inform you of your username.