Thanks for your assistance!
Just to check, it is Packlink who refused my claim for loss.
My only contact with Hermes has been through Resolver (their reply above). It's impossible to speak to someone over the phone, the only method of contact with Hermer I can see is through their automated chatbot 'Holly'. I still have 12 days before I can escalate the case to Customer Relations.
I take on board what you have stated and from what you have mentioned on the Consumer Rights Act I am prepared to go through the court route. Should I wait to escalate the case first and try to make a claim against Hermes through Resolver?