Processing time, too long

Hi, I am labib, syrian, studying PhD in uk, I have a tier 4 student visa. I have applied to Chinese tourism L type in Manchester centre in 3Rd of May and I did not get any entry permit yet, more than one month. I changed the dates of my flight three times and cost me around 850 pounds. Each time I ask them, they say be patient. Can you advise me please what to do? What is processing time for me?