Hi.
I think for 17 you are being paid well. You mention Sage as though you should be paid more for accounts work.
Also I am an accountant that spent 5yrs studying all levels of accountancy. I expect my pay packet to represent the hard work and years of slog, no life, tuition fees and exam fees I went through to get where I am now at 26
You are using Sage and automated accounts process thats easier than checking emails. It's not in the same category, as you have some basic knowledge perhaps, you should try an AAT accounting course in your spare time which would improve your pay and career prospects for the future.