I need vouchers for a rental I am already living in

I have been living in a rental for 3 years now. Landlord accepts section 8 vouchers but I can’t get them. Any advice?

I’ve been homeless but haven’t been able to get into a apartment yet. I’ve seen several individual get evicted and go right back on the housing voucher into another apartment. I haven’t had#chance. Supposedly I’m a client who qualifies for emergency housing voucher and the place who is able to refer me doesn’t know how. What’s next???