Reproduction Tail Light And Reverse Lenses 1965 Valiant or 1964 - 1965 Barracuda

has anyone here had to call the usps for a shipment that never arrived ? from a supplier , no usps tracking number or parcel number ? he claims it can be done , yet he won't do it . so i asked for my funds back . he says he won't refund because the parts are shipped , yet i have nothing . this is the first time and last time i'll deal with him .