Dishonesty by Mastercare

On 11 Feb I requested to terminate my contract with Mastercare due to poor services. I received an sms confirming the cancellation, but the monthly fee was deducted until 2 September. After numerous letters and calls I had to close my bank account to stop the transactions. I requested that my money be paid back for the period from March to September (6 months!). I've had no reaction from Mastercare on this.