I don't know how I could have phrased the question differently. I bought an MC account but no longer have access to the email address. But I have not saved the account, so the security question is sent to the email that I no longer have access to. What do I do now?
So what comes to my mind if you have no access at all then you should pick out your bill or similar things and contact the support
https://help.minecraft.net/hc/en-us/requests/new
If you bought it at minecraft.net write to the operator of the site where you bought it