does getting links from one site effects google rankings i have a site http://www.oneseoservices.com and it has 47 links and most of them get from one site and other one site is giving me 6 or 7 links would this harm my rankings.
With that amount of links it probably won't. If you get like 1000 links from one site then it probably would. The great secret is that your links needs to appear "natural". remember Google's thinking behind links - it's meant to come naturally because other sites see you as important and therefore they link to you. Building backlinks is dangerous if you forget this fact. Spread it out and do is slowly and gradually.
It should not harm but getting backlinks from only one site is not a good strategy for link building.
yeah, because you need links from all different valued site. Unless this is a PR 9 site I would try to get links from other sources.
You need to get back links from other sites as well in order to get to your desired ranking.. But be sure to submit your URL to relevant sites.
It neither harms your rankings, nor it helps much. I don't want to sound impolite but someone offering SEO services to paying customers shouldn't have to ask a question like this.