Thinking of cancelling insurance and feel that I should seek FA help, but I shouldn't go to the ones that sold me my current policies right? because they would have vested interest?

If you're thinking to cancel insurance to cut cost, that may not be the wisest thing to do. Seek advice from any professional adviser to review your portfolio if the plan still meet your current or future needs. You can always choose to walk away should you need more time to research and decide.

Not necessary. I recently canceled my policy, and the FA did not ask any question and peoceed to cancel the policy for me. Swift and easy.

Go through your current FA, but be prepared to do it yourself if FA pulls stunt to delay to protect their own vested interest.

I know because that happened to me, and I DIY-ed.

You should just go back to the agent that sold you this policy