NHS Refuses to treat me

Hello I have just joined after finding out about Scope on goggle. I have lots of chronic pain following a serious car crash 24 years ago, ostperousis server and mental health issues. I keep getting sick and food gets stuck in my throat from scar tissue from the traciostamy I had after my car crash it saved my life. The sickness and food getting stuck is getting worse. My GP referred me to hospital I was recently very sick needing 2 trips to A&E to get fluids via a drip. I requested investigations as to why I get sick as it's becoming a regular thing and I have a week of being ok then sick again. It's taken away my daily life I have a volunteer job that I can't go to. It's just me and my daughter no other family. I feel extremely lonely and never go out it's effecting my mental health big time. I rang the hospital to chase up my appointment to find out that they are refusing to treat me cause I missed 2 appointments 2 years ago. I rang them up at the time to explain I was ill both times but poor communication. I am now battling to be treated. Stress triggers off sickness and it's getting ridiculous. My life has no quality . My GP is trying to get help but I wondered if anyone else has been refused treatment?