@MojangSupport So, im trying to login to my Mojang account in order to change my (old) e-mail adress but when i try this, three questions(confirm your identity) comes up and i have no idea about their answers. can u help me?

For sure! That's an issue our Accounts team is prepared to assist you with. Please send us an email at aka.ms/Minecraft-Support and we will assist. Remember to attach your Transaction ID and account name / Gamertag. ^AM

Im sorry but there is an another problem. I have no access to the e mail that is associated with my minecraft account. What can i do?