got sandboxed?

So I have a pretty new domain(2 weeks old), and I used scrapebox to blast some comments(about 2,000 altogether after the 2 weeks... and it moved up a bit but now when I look at it again its completely gone from the results... was it sandboxed?
what can I do and what can I do to prevent this from happening in the future?(my other site has moved up in rank using the same blasts and is the same age)

also, when i search the exact domain it shows up..

Well it is recommended now a days don't blast directly money website

just create some authority backlinks for few days

sit back and see after few days for actual position then move on with variation of BL

variation of BL? and what do you exactly mean by authority backlinks? I'm new to SEO and haven't read up on the SEO courses/books I recently downloaded.. will check that out because I really need to learn.

First of all, there is nothing called Sandbox... Its just a myth.

Coming back to your website,
You have a new domain and you are blasting comments... Not a good practice.

Blasting comments will definitely create suspicion to search engines and this is why you are penalized.