Vfs global

I am a Zep holder with a waiver applying for a work visa. It's been 4months l have made payment for visa but l can't schedule the appointment on their website. The call agent doesn't help they keep saying they will follow up and get back to me but none has called me. They gave me an email where l can send my issue but still they not helping. I have send all my details my name surname application reference password but no progress