Debit order - Case no ***7

On 29 April I phoned in to Telom to enquirre about my debit order which was suppose to go off on the 25th. I was told that the payment had bounced due to the 25th being a Saturday and that it went off on the Friday, 24th. I only got paid on the 25th therefore the payment did not go through. I did an eft of R435.08 on the same day (29th). The following morning (30th) I got an sms that Debit order R 435.08 was collected from my account with reference NUDEBT TELK***D150430NAEDO DR0566. I tried to request a refund and get told that it will take up to 7 working days to resolve. This is not the first time it has happened. The last time I also requested a refund and it NEVER happened, they left my account in credit. I desperately need this money as i have other expenses that need to be seen to. Please help speed up this proses. My case no is ***7. Thank you