No help from Absa Bank

Hi, I don't normally like to complain but I have received no assistance from the Absa Bank RVN team. I have email a number of times but no response, only an automated email with a tracking number.

I am overseas and reset my phone ( Absa banking app which I used for verification), now I can't add another device and was informed by Absa online call centre staff to remove and re-add, this is now failing......how can I get this resolved? Please I need to make payments but need to add a new beneficiary which required RVN....