Advice appreciated. I sold an item to a buyer and provided tracking details with the courier company. Item was delivered within 3 days. Over 2 weeks later buyer contacts me to say parcel has never arrived. I tracked the parcel as delivered. Buyer contacted the courier company and they confirmed it was delivered in their mailbox. Buyer tells me it must have been stolen and its my fault as I didn't send the parcel track and trace. Buyer never asked for signature delivery (most couriers not doing this due to covid) or provided instructions of a safe place for parcel to be left.  He is making c...