Cancellation and still debting

i cancelled my policy in May 2014 last year and it was only captured on the Essential Group system in September 2014, i see they have still be debiting my account, so when i called them they said they would forward my information to the finance department and see why as they could see if was cancelled in September 2014, I'm still waiting for my refund and reason to why this was not cancelled when i requested this, its been 3 weeks and all i get is we have forwarded your information to the Finance department, they refuse to give you a number to call someone in the finance department.