What happened really sucks, but you have to realize there's a reason you're not allowed to share your account (and there's multiple warnings on shareplay and even a help article here about not doing it). On top of that you were trying to cheat. What you were trying to do was wrong and you paid the price. All I can say is I hope you learned your lesson. It is 100% fair that you have to start over, you shared your account and then to top it off walked away from it so he could do whatever he wanted. You're really young (too young for the people you're trying to interact with IMO) and tried to cheat and break the rules. Bungie isn't going to help you out. In the end I hope this lesson stays with you. If you try to cheat it will never work out well.