[mothered]

Also one of the excuses i get is "The package was signed saying everything was alrgith"
And even after i explain it was not my signature and they didnt take time to check who signed it.
They dont care and say unapealable blabla bla indian npc talk

Did you take It further by (for example) requesting evidence of the signature from the carrier's manifest, and/or escalating the claim to a senior level?

If not, then how do you expect the SE to succeed without any action on your part?