Why won't you cancel my membership?

<p>Instruction was given to cancel my Vitality membership as at 30/09/2016 because Vitality had stopped paying me my Healthy Food benefits after the withdrawal, 5 months earlier, of my investment. I eventually received a backdated payment of my HealthyFoods earnings but despite numerous e-mailed and telephonic requests to cancel my membership, I am still being billed. What do I have to do other than publically embarrass them to get them to close my account?</p>