debit orders

I have cancelled my membership three months ago and still debit orders keep going off. Cancelling my membership was a problem on its owe. The first two times I went to cancel I was told that the right person to do this was not available and I should leave my cell no and I did. The next day Someone called me to say it is fine I must just come in to fill in the debit order cancellation book. The next day when I got there thy told me that The the debit order book is full and they don't know when thy will get a new one and I must write down my details again because thy have lost it and someone will call me, thy never did. I then went back and spoke to Jean the manager, Who apologised and said that I don't have to worry my contract is cancelled and that there will be one more debit order. After that I received a double debit order because of a yearly levy. I thought this would be the end but to my surprise the next month a another one. I have contacted Jean again who said that only Ryan can cancel the debit order and that I can call him if he doesn't call me back. Ryan didn't call back and his phone is on voice. Three months trying to sort this out with no success