I'm being forced to do a GSCE and I can't change it or move schools

I joined year 10 this september, we got our opinions 4 days before we broke up for the summer holiday and I realised I got given photography when I shouldn't have gotten it.

I contested this but they told me to suck it up since I 'picked it as a back up' but I had already gotten my 1st option for the box i picked photography in and they told us it was one or the other????

My options that i picked are as listed:

box 1: history main, geography backup
box 2: business main, technology backup
box 3: separate science main, photography backup
box 4: technology main, imedia backup

I was given history, technology, separate science and photography and it seems like they just completely ignored my last box despite being told that was NOT going to happen????

I also have to clarify that we were specifically told that if we didn't get our main option in THAT box, we would get the backup!!

I also asked the teacher who was doing the options process and he reassured me this was how it was going to work because I had really no other option but to pick photography since it was the only one I'm "good at"

When I came back to school in year 10, I went to the photography classes for a term (while still begging and contesting for them to either put me in imedia or business) and it was horrible! the teacher is straight up abusive, doesn't help and hasn't been in school for 5 months (as I'm writing this)

After this term, I told the teachers to either swap me onto another subject or I'm not going because I shouldn't have been PUT IN IT but they're point blank refusing to swap me and are telling me to suck it up or suffer with a failed GSCE.

They used the fact I was going to the classes against me and once I started refusing to go, they used that against me aswell.

They told us that we could drop out of a GSCE and pick up another if they could but as soon as I asked they dismissed me??!!

I have about 6 week before starting my photography GSCE and I haven't done ANY work because of the lack of support and the fact that I've been completely ignored????

I should also clarify I'm the only kid in my year having this issue with them not taking my other box into account and being put into a class I shouldn't have been put in.

They mentioned it one time while i was complaining and contesting it.

Not only that, no other school in my area is accepting to let me move due to the fact there arent enough secondary schools so they're already full so I can't switch through moving schools either.

I honestly don't know what to do as I need to have a 4 or higher in all my GSCEs to get into my desired sixth form and I was hoping to pick business as one of my A levels

In boxes 1, 3 and 4 you got you main choice. The only box you didn't was box 2, where you wanted to do Business.
The backup for that box was Separate Science, but they couldn't use that as a backup because they'd already allocated it to you as your main choice for box 3. So they had to use one of your other backups. They chose the backup for box 3 (i.e. Photography) presumably because that's the backup for Separate Science, which they'd already allocated you.
Why is Photography even on your firm anywhere if you didn't want to study it?