I have the same issue, but you should just ignore them (unless it involves prosecution). I let them get to me and it seriously got me down which then led to bad grades which they moaned even more at me about. To be honest, you should just keep your head down and hopefully pass your GCSE's. Thankfully, I've been accepted in a college without too much concern regarding my attendance but it was due to my grades. Just think about yourself and your welfare. That's all that matters
... will I be disadvantaged?