Debit order cancellation

It's hard to reach this company. I cancelled and they said they dont have an a policy for me. I emailed my bank statement and i havent heard from them.still deducted. I sent my bank statement for a refund from May up till date. I signed up May and they didn't cover me as my application was pending. I tried cancelling before it was complete. Please refund me for the months that you debited me cos i cancelled within that 30 days grace period. I sent my bank statement a month ago. I don't expect to receive my refund in 7 days. That turnaround has passed