Keep backlinking and give it time.

you can try to create a manual RSS feed of your page/s and submit it to all the RSS directories.

That would help for sure and goes along with backlinking. Maybe try getting more authority backlinks instead of just quantity.

How many back links does your first 10 competitors have .

Get more with higher authority

Another way to get more backlinks is to write an article and use a submission service to get it out to a few thousand directories. Some will be really go quality and others will just be another number, but it is cheap and it should help.