Yeah our customs are fools im thinking about just generate a seed then wipe the device
and generate a new seed and use a passphrase but im not sure if that enouph to be 100/100 safe
Yes, it should be enough to eliminate the chances of tampering. All you need to do is to factory reset and then while setting up the device just create a new seeds and Passphrase is extra layer of security as well.
Since you mentioned that you bought from official website and crypto is considered as illegal then I don't think you got any other choice as well. If you're still paranoid about the security then why not try and Airgapped cold wallet?