If the missing items were mentioned anywhere then they should have been included or specifically stated as not included. If it were me I would have apologised and offered either a partial refund and keep the camera or to return it at my expense for a full refund.

Incidentaly I see you offered it for sale overseas, are you aware that you are forbidden to post anything with a lithium battery overseas using AP and that domestic parcels should be sent with a road only sticker on them.