buddy, I really understood your situation and inspired by your persistence. Actually, I just got my third IELTS results, and enrolling for my fourth IELTS. My suggestion to your reading part is to read BBC news and try to expand your vocabulary. Good luck!
ps:提示所有死磕鸭子的童鞋:范听bbc、美剧、听歌唱歌都是bullshit,这种舒舒服服的学习办法对一般人不好使。因为你不是3岁小孩anymore,按范文的话,their(孩子的) brains are still programmed to acquire their mother tongue, which facilitates learning another language。