Car insurance premiums

Good Day my name is naven i have a discovery insure policy on my vehicle and a year has gone by and i was told when i initially took out the policy i was told by the consultant that after a year has elapsed i must call and let them know so that the premiums will drop i have been trying to call discovery numerous times and till this day i have not got thru to them and i even left a complain on there website to call back still nothing this is madness because as soon as you one payment they on the phone calling you