No response to emails and telephone calls

I am so fed up with your service. I can't believe that a company as big as yours will treat clients this way. Emails enquiries take forever to be responded to. I take it that you are aware that you are dealing with people who are in a delicate state and who need your assistance. This is not some cellphone company or a corner shop. We will mobilise and take business away from you if you cannot serve us.