What can i do with an Echo Dot 4th, DSN Blocked?

I bought an Echo Dot 4th and after hours of trying and calling amazon support, they told me the serial (DSN) were blocked and that i cannot use this echo because of this... well i already fix the issue with the seller, but i keeped the echo dot 4th blocked

and i was wondering if i can give it some can of use of fixing it in some way, any ideas? thanks in advanced