Bad service from Discovery Insure Policy Renewals team

I am not impressed with Discovery Insure! I objected to my renewal premium a few months ago (before the renewal date of my policy), and have still not received a satisfactory answer to the points I raised. I asked for the MD's email address after getting nowhere with Discovery's consultants, and was told "Please be advised that we are not allowed to give you Mr. Ossip's email address, if you have a complaint you will have to escalate to management first before and if they can't assist you it will be escalated further to the executives." Needless to say, this email did not include any information on how I could escalate my request to "management". I am definitely not accustomed to experiencing shoddy service from Discovery - it is a premium brand and should not be treating its customers in this fashion. I would be most grateful if somebody could get back to me and give me a proper answer to the objections I raised.