Maybe i have a solution for you!
On my 3ds i found a way to get unbanned from wintendo network
1- start formatting your 3xs
2- when it start the formatting process, disable the wireless connection and remove your sd card
3- after formatting, setup again your 3xs and insert sd card
go to friends list and see the magic...
if it didnt work, well, to me it works
now.. keep here this information, if they find we know this exploit they can fix it goodly quick
On my 3ds i found a way to get unbanned from wintendo network
1- start formatting your 3xs
2- when it start the formatting process, disable the wireless connection and remove your sd card
3- after formatting, setup again your 3xs and insert sd card
go to friends list and see the magic...
if it didnt work, well, to me it works
now.. keep here this information, if they find we know this exploit they can fix it goodly quick