Primary google account banned

Google account banned, for policy voilation. even appeal closed...
there is any way restore or download account data

No, I do not believe so. I have had a few banned. Whatever you did, right or wrong, do it better the next time. I got banned suggesting edits on a spammy competitor who cheats the maps. It doesnt matter whether what you did is good even, just dont spam it.

If Google team denied your request, that's sure you can't back this account. But there have a chance to download date