That's not really very nice of the ebay seller to refuse to help you
- I send quite a few parcels via myhermes and there's only ever been one that went missing - Tracking said it was delivered but recipient said it wasn't - when I contacted hermes (messaged them on facebook - this seems to be the quickest way to get a reply) they were even able to tell me exactly where the driver had left the parcel,as it wasn't there they accepted that it had gone missing and I was refunded.
I'm waiting for an Amazon parcel at the moment - it was due to be delivered yesterday but apparently the Delivery attempt failed,although as I was in all day I'm not sure how? hasn't arrived today as yet either