Double debit order.... Urgent Refund

On 07 January I made an eft payment and sent an email to *** to allocate the payment to December and not to double debit as advised my sanlam Adviser. An email was received confirming my account is up to date. Today a double debit order has gone off my account. Please arrange for an immediate refund of the additional amount that was taken from my account. This is urgent I have other debit orders that will be going off my account. I have tried calling but have been on hold for more than 40 minutes. Also no response via WhatsApp.