They offered sending me a new device in exchange of destroying the current one and taking video proof for that
but since im living on third world country and customs usually opening packages
they may do it again with the new device (Break the seal)
also my coutry is against crypto and considered illegal i gambled and got lucky this time to not get seized but who
know what may happen next time

Factory reset and update firmware may be enough to reduce some security risks. But IMO this is one of few cases where you should consider either,
1. Using dedicated computer, laptop or phone device exclusively for cryptocurrency wallet purpose.
2. Build your own hardware wallet. But you'll need some electronics skill and find shops which sell electronics/IoT parts.