@cool_khanarohan We at Passed Tense offer a very reasonably priced bundle of exam prep for Level I. You can try it free for 7 days, which includes all of our Level I video lessons: https://www.passedtense.com/Free-Trial (the trial is for the December 2014 exam, but the June 2015 content is not that much different).
I’m assuming by online service provider you mean study provider. I highly recommend Schweser, I just recently graduated college and now work in the industry so I have a good base but Schweser really helped fill in the gaps in my knowledge (I hope). Another thing I would recommend to you is spending the extra money if you can to get a paper copy of the texts and test. The way I see if the test is on paper, machines break and books aren’t connected to distracting things like reddit and espn.com