Account in arrears even though debit order went off

My debit order is scheduled for the 1st of every month. This month if fell on a Friday that was a public holiday so naturally it would debit on the following Monday. The debit order went off as normal but when I checked my Vodacom app it shows I am in arrears and need to make payment. I clicked on it too see how much I am in arrears and it shows R0.00. Over the past 4 days I have been to the vodacom store in the Newcastle mall 4 times and phoned them numerous times to get this issue resolved as I want to upgrade my contract but can not because I am showing in arrears. They assured me today that the system has updated at around 12 and that I should be able to upgrade in around an hour. It is 18:20 and my account still shows that I am in arrears and now I will miss the promotion for my upgrade that I really wanted. A 2 for 1 with 2x Huawei P30 lite 2020 models for R449pm x 24m. Now I have missed the upgrade opportunity and this issue is still not resolved! I am very upset and disappointed with the service I have received