Double debit order

In December 2019 my monthly debit order was returned, this was subsequently paid on the 24th December after calling in the call centre and proof of payment was sent through as per call centre request. I was shocked to notice on the 03rd of January that a double deduction went through on my account without me being informed prior to this. Discovery now informs me that I have to wait 2 to 3 working days before this amount be returned to me. What about bank charges for debit orders returned as a result of this double deduction?