Debit order mandate still active, No cancellation letter and no refund from Qwiek loans

After the last post I was asked to take the post down and my R250 will be refunded once I have submitted my bank statement. I have since submitted my bank statement and they are now ignoring my emails in terms of the refund. I have also not received a formal cancellation letter and the debit order mandate is still active on my account meaning they will deduct my account again this month. Please help!!!!!