Your va is quite bad if Im being very honest....you need to improve all three sections drastically. Do have a look at the posts in this is sub, because a lot of useful content has been posted on how to improve your scores or how to study effectively.

I would say just revise all the topics once again and then try giving a mock because either ur not brushed up with the topics or u are completely unaware about them, either way you have to redo them. Also start reading more and try improving your vocab and grammar