I'm surprised they would not exchange the servo.......as for the Futaba, SC busts up the radio kits and sell a lot of transmitters only...............they sell the servos, receiver's, switches ect out of the original transmitter box and package it in plastic zip bag. The OEM stand alone recievers most people sell have a higher cost.
Sorry you had trouble on your first order, been ordering from them for years with out trouble but to be honest I never had a bad Hitec servo to send back either.