Unconsented policy changes by Discovery Insure

As requested by Discovery Insure, I reviwed my anniversary policy. I was shocked to notice that Vitality Drive had been added to my policy. On inception in 2019 I declined this option, but now in 2022 I notice it has been added at an extra cost. Also, I had car hire on both my cars since inception. Again on review of my policy doc, I notice that it has been removed from one of my cars? I have sent numerous emails since 22 July 2022 requesting resolution with many not answered and me having to follw up again and again. Calls to the Call Centre also have not helped. I have an email saying I would receive a refund for the Vitality Drive. And then another saying they cannot process. As a last resort I called again today. On speaking to Theresa, I am warned that if I remove the VD then my premium will be increased....first time Im told this... sounded like a threat to me! However it is the principle....My understanding is that no-one can make a change to a contract/policy in any form whatsoever without my specific consent surely!! The call to Theresa today dropped without resolution and I am now just so fed up with them. I think its time to move to a more professional company.