That's really weird that they've just sick noted you for longer than you wanted. I can't remember if I said before, but it's awful as well that your work think they can just not pay you sick pay. I thought everyone got sick pay because we're not america. I think the form is a good way to have the conversation without making it seem like you're picking a fight though.

(I know finding jobs is awful but you really need to find a new job.)