Offers run for a limited period. After that you automatically move to full price, unless you cancel before the offer expires. At that point you may get a a further offer to tempt you to stay. You won't get anything by posting on here.
To follow up from @redchiz1 you’ll never speak to staff about TV memberships on here. Go onto the offers section of your account and the website to see what’s available.
If playing the cancel game isn’t working then go onto live chat to speak with staff, they might be able to get you a deal. Make sure to click “chat online” within the green box, avoid “get help quicker” as this is a bot.