"Huge wait time"

After being referred by gp who said they would get me an ambulance but the wait time for the ambulance would be 2 hours I was instructed to go to a&e asap so my other half brought me immediately. I was put in a queue to have basic tests which took ages and no seats were offered bearing in mind I had been in bed unable to move for 4 days so was extremely dizzy. I was passed around departments before reaching majors B. I was the fourth in the room so didn’t expect to be waiting too long considering I had already been at the hospital for 3 and half hours. I waited for 3 and half hours more in majors b and seemed to be put to the bottom of the list. I was suffering with dehydration was offered no food or drink for the duration of my visit and decided to approach the reception to find out why I was being left until last. I was then told there were 2 more people before me in the queue to be seen. I was eventually seen after 7 and a half hours at the hospital and put on a drip and sent home. On arrival they knew I was dehydrated from my referral so I can’t begin to understand why they couldn’t have put me on a drip in the waiting room. When I was sent home I still had low blood pressure but I got the impression they just wanted my seat for the next patient as as soon as I got up someone was thrown in my seat. I didn’t feel well cared for at all and I do appreciate the pressure they are under right now but 7 and half hours seems such an extreme wait time and today (I visited yesterday) I feel like I’m right back to the beginning again and really don’t know what to do.