my account has a email i dont know

🔧Technical Issue

i rly dont like my name so when i want to change my username i need to go to google valorant etc log into my account which is fine but to enter setting of my account i need email verification but that email i dont know never used it never seen it and when i click i dont have acces to this email anymore it puts me into mfa authonthication page help when i click at how to disable it 1) step.....LOG INTO YOUR ACCOUNT (here it is explained in screenshots its in my language but im sure yall can just translate so first screenshots is when i click on my acount and my accounts settings it needs the code then the second screenshot is for when i click i dont have acces to this email anymore aka the bottom message the third one is going to the subhelp called:how to disable mfa fourth screenshot is the first step of that page which means 1)LOG INTO YOUR ACCOUNT which like i said i cant do cuz it puts me into the last screenshot which is the same as the first one please help me