Discovery Health appalling service

I lodged an international medical claim with Discovery health in February 2015. I eventually paid the bill myself on 11 May as nothing was happening from Discovery's side - needed to apply for a new UK visa and didn't want Discovery's lack of payment to hinder Visa application. As of 29 June I am still waiting for a refund. Sent numerous emails to Discovery, plus made numerous phone calls. Appalling service.