[mothered]

I think the photos were taken while on the ground where they have been taken previously with many dpd packages going there which they will have to cross reference if they decide to investigate so I would not like to do the DNA method, definitely not suited for this.

If the package was left unattended, photographic evidence Is useless.

They can take 100 photos If they like, It doesn't change the fact that the package was dumped without any form of verification from the consignee - yourself.

if I say leaked battery method and had to dispose of it ASAP  when I found out

Correct.

I can say it was leaking from the package unopened and had to call services in the country Im in now to dispose of it safely?

Don't mention that, they may request an Incident report from the entity who disposed of It.

I can say this to curries through ebay website and then after that if they dont want to refund me go through ebay, and or Paypal.

PayPal Is always the last resort - when all else fails.

Consider It a backup plan.