Dishonest and harassing Agent from Dotsure

Went into their site and requested a quotation and I got a call from Thurston. He explained the process and requested I need to give correct and accurate information as any incorrect information will affect the policy negatively at claim stage. He told me he wants to confirm the information and I told him I dont have time. I realized as we are going along with the call that he is starting the quote all over again. He said the system did not keep my details hence he is starting all over , asked him then where did he get my number if their system did not keep my details and how did he know that I am looking for car insurance? I told him I am not comfortable continuing with him I need to speak to somebody else. He insisted that I need to speak to him because even another consultant will do axactly what he is doing. He kept on calling me after I have dropped the call I told him that I view as harassment what he is doing now. I am not happy at allI dont think I should be subjected to this kind of treatment from Dotsure