Denied Autism Assessment

I have posted here before. I am 35 male. 

I spoke to my doctor and they said I should do an assessment for autism and they put me forward to a clinic. I did the autism assessment form with my mum. I filled in everything and totally packed out the extras page. 

The clinic I was sent to has terrible reviews on how they say you're not autistic if you're chatty etc. they denied someone instantly for pulling out their chair for their wife. 

Anyway I didn't hear off them so I rang the doctors and another doctor said my application was denied because I didn't give enough information. It honestly baffles me because I packed that page out. The doctor then said after talking to me I am too sociable to have autism, which annoyed me. 

My uncle has autism and has never worked due to it and has a carer but is the most sociable person. At the time I was like ok but over time I feel more wound up. 

It really disappointed me. I'm tired of being told that I don't need to be diagnosed or there's no cure for autism. I don't want to be cured but when I looked into it so so much made sense for me. Now I feel like I am a liar with anxiety that's my own fault due to not having perfect diet etc. 

Getting diagnosed would have been like my brain had finally been pieced together and I could have guided through life knowing this. 

I am considering paying over £2000 for a private assessment but if I do that to be told I just have anxiety I will be real stressed. I work full time but saving the money would be hard. 

Has anyone else had experience like this or has advice?