The best thing to do would be to contact Microsoft. Or try on your end to do forgot information and file the information out accordingly. No one on here is going to be able to get your email. Contact Microsoft and they should be able to give you the email you signed up with once you provide...
I feel like it's just there way of trying to stay on top. Every other company offers unlimited. Hopefully, they just have to work it out. It's not bad though to have it with Verizon. Good Service.
Whenever you participate in modding you void your right to your account or console. It's the risk you take honestly. Microsoft has alway's gone after modders.