I recently got started on mixing bitcoin on Grams Helix but none of my transactions seem to be going through. Apparently low fees is the problem. What I dont get is how to set this up because I have done my calculations so that the 2.5% fee is catered for but still nothing. Can anyone help me out on this.

Well i don't used it and i don't have experience on it, you must send the message to their support about your problem, usually i used https://cryptomixer.io/ i don't get any problem with this service.

I'm newbie a bit and I found interesting article about Eos who jump on 5th place...
Article here: https://www.spam blocked b/eos-cryptocurrency-that-jumped-on-5th-position/

I read a little about Eos and people said "EOS will be ethereum killer". I always thought that ethereum is the best altcoin and Now I'm confused.
Can you told me more about this crypto?

Don't think based on your mind only, because cryptocurrencies is for all of people around the world, you must follow the trend of cryptocurrencies, if many people who do investment in EOS you must do it early than another people, cryptocurrencies is about investing.