I have received a parcel I did not order. It had the same reference as the parcel which I ordered. I have 2 parcels. One I ordered and one I did not. The book I will keep. I did not order a shein dress !
If seller sent you something by mistake, it is up to seller to provide a return label. Do not on any account agree to send on to the correct buyer, it is not your problem, it is up to seller to sort out.
