Thanks.So I have to remove each thread from my subscribed list?This is 10 pages long I thought just unchecking email notifications box will do it.
You can narrow that down by clicking this:

which will select all of the topics on the page. It's not a perfect solution, but it's better than having to click 20 times more. You'll only need to click - all in all - a whole of twenty times. One for the "select all" and one for the unsubscribe button.
Yes I got it but it is still boring to click 10 pages to unsubscribe all threads lol.
Thankfully I haven't replied in many threads for this could have reached in hundreds of pages and I will have to spend days to unsubscribe all.