Poor pay or am I exaggerating?

So i’m in Uni and i’m 21 years old and i’m in my 3rd year at Uni which is a placement year. My placement has technically finished a few months ago and i’m working there still being “They really need my help”, so I stayed on. My roles have dramatically increased with me managing payments and becoming the places IT support as i’m just very good with computers, so I fix all of them too. I already work over the national limit without signing anything roughly 57 hours Mon-Sat. So I essentially work 3 roles for the company but my pay hasn’t increased and 1 time by accident I was fixing the accountants computer and found out how much everybody gets paid, to find out i’m the lowest paid person in the company, only earning minimum wage of £7.80 per hour. I found out the cleaner earns £10 per hour, the drivers who are foreign and don’t speak good english earn £12-15 per hour and people doing the same job I did originally earning £14-18 per hour and i’m doing 2 other roles on top of that which is fairly critical for everyday use.

So I have been there for 11months now, so i’m fairly newish but some people who have joined only 4 months ago are earning more.

I asked about my pay to be increased and they said i’m getting a fair pay similar if not more than other people, without them knowing I have seen the actual pay. Should I just leave the company or am I being stupid?

Lay it on the line to your boss, he needs you more than you need him.
Don't pussy out, go straight in his office and tell him your not going to work for **** pay any more, you know how much the previous guy got and you want more as you are doing more tasks, mention that he will be royally ****ed if you weren't fixing his I.T woes. .
If he doesn't deliver tell him to "get ****ed" and leave.
Never stay in a job where you are paid **** all, you are just being taken for a mug.

dude i'm 17 and i get £11 per hour... change your job if you can!

They've said no.

Huh? Who has....? To what...?

The drivers at your company are earning £32000 per year?!

Huh? Who has....? To what...?

Only the ones who have been there a few years, the standard ones are on £12 which is about £24,000

Leave.

They are pushing emotional buttons in your head and taking advantage. The very basics of it is this sort of thing happens in all bad companies, people dump work on people they perceive they can get away with it. Some human beings even do things like convince themselves that they believe the person being dumped on actually really enjoys the extra work! What generally happens is a manager will go oh that's disappointing so and so left and then be up **** creek without a paddle and start kicking off after a couple of months when it becomes obvious, then they'll go and find someone else to do this to.

As you are on a placement you are in a particularly vulnerable position. That's ended though.

Go. Walk out the door. Dum dum dum.

Don't kick off, be the utmost model of politeness.

If you wanted the nuclear options (and I'm not recommending any of these) working time directives, there's also unlawful deduction of wages and even equal pay claims. Not recommending. The most sneaky way to do it is to leave and shop them to HMRC on not paying you the minimum wage if you have evidence of working 57 hours a week. Minimum wage laws are so laxly enforced but in more recent years they have been cracking down more, particularly on placements and internships.

Buy a book on negotiation and read it for future jobs, something like Never split the difference. Also have a riffle through employment law stuff for future jobs.

That’s my problem I do get minimum wage for my age which is £7.70 I believe. But i’m not sure what effect doing so many hours has, I need to look into that. However I probably won’t report them, just so I can get an understanding for myself