No service from vfs global call centre, no hope!

I have done my online application and payment on 11/11/2019, more than 2 weeks ago. They say on the website, that you need to wait 3 working days to schedule online appointment. After 3 days I emailed and called the call center for assistance as instructed by the website, I spoke to lerato, then found out she went on leave when following up, asked michael ph for assistance, asked Bruce for assistance, today I have spoken to Nebraska for assistance and still nothing. I have even used internet explorer as opposed to chrome as instructed by them but the issue is still the same. I have done everything they have asked of me to no avail. They dont allow me to speak to a supervisor and at the same time fail to resolve the issue so that I can book an appointment online. This is very frustrating, when calling in at the call centre, they refuse to give a reference for the call and it just seems like they want to pass the buck instead of doing their jobs. They ask you to send emails, but dont respond to your emails. I have sent 8 emails to date and still no response. I dont know what else to do. I dont think their management is aware of the unhelpfull service that the call centre agents are giving.