Incorrect debit order amounts deducted

December I paid my installment early on the 17th but another deduction was taken on the 27th...i called and the consultant did not know what to say eventually after multiple calls on the 12th of January I received my refund then boom 25th a debit order goes through of and amount not signed for on my contract and I've sent complaints emails but no one is even acknowledging them then when I called yesterday the lady says it has been received and forwarded to another department and she doesn't know why they have not made contact... Like how ridiculous is that. For all this drama I've been put through I actually want my whole refund for my 1 months installment as an apology for the inconvenience and mfc takes the fall because this is beyond being negligence on people monies.