bitcoincore banned all peers and I can't to sync I started downloading the chain and got to 14% and it just stopped and still shows 7% per hour but not moves.

I checked and it banned all the peers and everytime I unban them they just get banned again, what is happening ?
Peers can get blocked for multiple reasons


sending too many invalid blocks
sending too many malformed messages
using too much bandwidth (e.g. your maxuploadtarget setting)


and probably others.

There are logs which may be helpful and you can review available options


-banscore=&lt;n&gt;
Threshold for disconnecting misbehaving peers (default: 100)

-bantime=&lt;n&gt;
Number of seconds to keep misbehaving peers from reconnecting  
(default:86400)


-whitelist=&lt;IP address or network&gt;
Whitelist peers connecting from the given IP address (e.g. 
1.2.3.4) or CIDR notated network (e.g. 1.2.3.0/24). Can be 
specified multiple times. Whitelisted peers cannot be DoS
banned and their transactions are always relayed, even if 
they are already in the mempool, useful e.g. for a gateway