Pinetown Galvanizing PLEASE ANSWER THE PHONE

Good day I tried to call Pinetown Galvanizing to get information on a little gate they galvinized for a contractor. After the first bit of rain and only a month old the gate is terribly damaged by rust. My carport is 5 years old, also galvanised and not a sign of rust. I needed their honest opinion was it the galvanizing or the contractor that damaged it while installing. The contracter says he don't have the invoice anymore??!# I want to check with them, WAS THIS GATE ACTUALLY GALVINIZED-PINETOWN GALVINIZING REFUSE TO ANSWER A CALL AND HAVE NO MESSAGE FACILITY TO LEAVE A MESSAGE. WHAT IS PLAN B?