Cancellation of Membership

My Broker cancelled my Hosmed Membership on the 31st of March 2015 to end on the 31st of May 2015. So I was under the impression that this was done, but on the 1st of June my debit order went off. On investigation, Hosmed haven't stopped my Membership. I have received an email on the 10th of June stating that my membership ended on the 31st of May and on the 11th of June I received a new letter stating it will end on the 30th of June 2015. I have phoned and after many hours on the line - with no answer - they informed me that my membership will only end on the 30st of June. That is unacceptable. I am not going to pay for June. I am already on a new Medical Aid - I can't pay 2 medical aids. As far as I am concerned my Hosmed Membership was only until 31 May 2015 - and I have never in 3 years even used it once. I want some feedback ASAP.