It is time for you to ask for a copy of the invoice or other proof of purchase, a copy of the tracking number information and shipment record to Borderview, a verification that Borderview received the gun and a copy of the initiating form that the seller filled out for Borderview. You are past dealing with people on the phone. Make email requests or certified, return receipt requests by snail mail. "Phone call? What phone call?" Phone conversations are often in one ear and out the other. It is hard for someone saying you made no request when you can establish a paper or cyber trail.
