Poor internet user support and poor call centre service

I am currently based overseas and a few years ago set up my online banking account to send the RVN security code to my email address instead to me SA mobile since the number is no longer in use. This worked great for the past 4 years until ABSA enhanced the security platform and now utilises SureCheck instead. Would be a great improvement if this change didn’t result in the code being send to a redundant mobile number rendering my internet banking service useless over night. I spoke to a great call center consultant last week Thursday who provided me the contact email address of the relevant department to have this fixed. The transaction I needed to conduct was quite urgent however I was advised that this department cannot be contacted by telephone. I submitted the required documentation to the email address I was provided and when no response was received by Monday I followed up via phone call to the call centre again. I was told that this will be attended to within 48 hours. After 60 hours still no reply and I called the call centre again explaining my situation for a third time. I was promised that a supervisor would contact the relevant department and ensure my case was treated as urgent. After all the payment I wanted to do was urgent and nearly overdue. Another 48 later and still no solution, 4 follow up emails later and no response. This means I am stuck in a foreign country without being able to use a service I am being charged for, great example of extraordinary poor customer service. Please resolve asap, I used to enjoy banking with ABSA - this experience might just turn me away from what I thought was a great bank.