[hiimyourdad]

All got delivered in the same box by DHL. Ordered 2 drones, a bag and a gimball and I said only 1 drone came

What's the weight of the Item you claimed as not received?

They’ve investigated and refused a refund even after I provided a police report due to there being sufficient evidence of delivery.

What exactly Is "sufficient evidence?".

and would normally take it further to the head office but I cannot find any contact info online

Simply ask them for the contact details, and/or request your claim be escalated to their senior department.

Weight was 10kg but I heard DJI was pretty easy to do.

Sufficient evidence that the whole parcel was delivered with the correct weight.

I have done this and they have said the investigation is closed.