I don't think anything you learn is a waste lol and looking at it from another way, it looks like you've found out what you DON'T want to do, which is valuable. Better to realise that now, while there's still a chance to change courses and get funding, than get to the end of your degree and realise that you'd much rather have taken something else.
But seriously, if you're so unhappy taking English then you really ought to go and talk to someone about changing. If you want to stay at the same uni, then it could be the case that you can swap over without having to drop out and restart. Or, it could be the case that you just need to go back and start the second year again. You won't know until you ask
Or, you could ask about maybe combining the subjects if you don't want to drop English completely, that could be an option.
I think too that you need to address the fact that you're depressed - is it your unhappiness with your course that's causing this or are there other issues that you need to address first? What I mean is, will changing course help or are you unhappy with other things about uni too, like the location or just the whole atmosphere, or is there something else in your life that's bothering you? There are essays etc in sociology too ... are you sure that's what you want to take as a full course or did you enjoy it simply because you took the course without feeling the same pressure to do well as you do in English? I don't mean to put you off changing here
but there's no point swapping courses if you're going to be equally as unhappy doing something else.