Duplicate debit order by Standard Bank

There was a duplicate on my Home Loan debit order taken by Standard Bank on Friday 26 July 2019. I went to my bank branch (Nedbank - Mall of the South) to query about the duplicate debit orders, where they assisted with the reversals, I requested them to reverse for one moth but they reversed all my 2 debit orders. on the 29th of July I went to Standard bank branch (Wits university matrix) to request them to fix the problem by debiting for the month of July since the money is still sitting on my account which they promised to do but failed to do so. My concern is that my account will be seating on arrears while I didn't not create this problem. The reference Number with Standard bank: ***. I tried to contact the Home loan Department at Standard bank but to no avail.