Login failed for VAF userid error

I have been trying to schedule an appointment to submit my application to VFS South Africa but i keep getting a login failed for VAF userid error. Online payment is done and the payment is already reflecting. I wrote emails to their help desk and they told me to call the call centre. I did call numerous times, they said I was using the wrong browser twice then they told me to clear cache and try again, still nothing. Was asked to email my error to a consultant and still nothing then was told that they have forwarded my email to the relevant department and that no one can make the appointment for me until the error is fixed and i have to wait again. It's been 9 days of calling and emails and i'm still waiting.