@ Deepa If you look at the nine months that were wasted, you might lose even more in the future because of the restriction of a wp.com blog - no ads, js etc etc 
I might be able to able to suggest you a good option if you tell me how many pageviews you get per month.
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I think the following option is the best if you have high number of page views ( and you don't want to pay for the upgrade )
Start fresh on your new blog. Do not move posts. Include a message on your old blog saying that you have moved the blog to a new domain.
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If the number of page views are not too high, then I suggested moving the entire content to the new domain.
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Best option if you are ready to spend 13$ extra per year is move all your posts and redirect. Google search traffic won't be affected much. It will recover in a few days if you do the redirect properly. Pay for the upgrade for few years ( say 2-3 ) and after that you can stop paying for that upgrade. By that time, your new domain will rank well in Google.