Uckfield Sex Clinic - Walk in clinic?

Fed up with this clinic. Every time I go there's not enough staff working. The woman on the front desk is unhelpful and it's a miracle if you even get seen. Twice I've been turned away but whenever I've tried to ring up for an appointment they say there's no need for that just walk in. Also it doesn't take three and a half hours just to see three people so something needs to change.