My Xbox account got banned with error code 0x80a40020 and it has been banned for a while,...

The code you posted means that your console has been tampered with and cannot connect online at all as it has been banned from Live. This would be the reason it cannot take the update and there is no workaround for the ban.

support.xbox.com/.../error-code-c800-0036

You are completely missing the point that the 2011 incident was an automated error that flagged consoles as modded,thousands of people got console banned at once,i don`t think their accounts got banned too,i may be wrong.

When people post here individually claiming not only has the console been banned but also all their accounts, there is zero chance the 2011 incident has happened again.

Yes they made a mistake in 2011,but would you honestly bet money that this guy is 100% innocent and has been banned in error??

According to the Error Code Lookup, you have been console banned.

“This console has been banned for violations of the Terms of Use. To protect the Xbox LIVE service and its members, Microsoft does not provide details about console bans. There is no recourse for Terms of Use violations.”

support.xbox.com/.../error-code-lookup

my account has been banned and there is no case review on it to reply back can you please fix this , i got banned for my son replying in a message to some kid on my xbox then now my account is banned till tomarrow please fix now...

I got console banned while playing on and account, if I buy a new xbox and use the same account will my new xbox get console banned? Or will it not