I used Sendle to ship my ebay sale.. the buyer had paid $71 including post for this item. Sendle picked it up from my house scanned it into their system and then it disappeared. Three weeks later after my buyer complained, Sendle says the parcel is lost. What's worse is they are refusing to reimburse me the cost if the lost parcel. My ebay buyer is obviously expecting a refund. But why should I be out of pocket $71 because of Sendle's negligence. what can I do?