Perhaps I'm going too far here, but I'd venture that you might be suffering from depression. I don't know, and I don't know any more than you've said, but from what I've read: the exasperated tone, the sense of futility and helplessness etc, it's maybe something you could look into.
A-levels are advisable, because they're seen as the most academically challenging qualification available. Btecs are not that well regarded in the top end of the UK uni rankings, but it depends where you want to go and what you want to do. They could actually be better if you want to do media.
I'm sorry you got such bad advice, and I'm sorry you've already started down what could be the wrong path for you (or, depending on your goals, quite equally the RIGHT path
). Don't let your emotions cloud your judgement, and speak to Connexions, or a teacher etc you trust. You need to make informed decisions, so get some good information this time
Alternatively you could do a UK Bac, and that's pretty highly regarded now.
You have SOOOO many options. You're nowhere near a dead end, so chin up and get thy life back on track.