Worse Experience ever

I have a policy with One life which i took out in November 2013. They called me last year to upgrade my policy and i didnt at the time. This year i was diagnosed with PE which im taking treatment and left with 2 months to finish the treatment. I called 1Life and told them about the diagnoses and they had told me it does not affect my cover because i was diagnosed after i have had the life cover. They also explained to me that i cannot increase the Life cover due to my current condition which i was fine i said it was fine. I asked for an updated Policy and i havent had it and they also told me that they cannot note my medical conditions on my policy i must submit proof. And i explained to them that i was diagnosed in Hospital by a specialist which i will see in July at the end of my treatment. I really dont understand what is going on, since i had had this condition 1Life has taken an ugly turn into how they treat my policy. Today they sent me a form with wrong Surname and addressed MR and i am a MISS also with my ID number and policy number to sign. Like what is that ??? How do i sign something that is incorrect and no one explained what the form was about.