Solving this problem is so easy especially if you are using Blogger. I don't know why Blogger does not forward your domain.com to yourwww.domain.comautomatically when you tick that option from blogger.
I tried to contact Godday support and they told me it takes up to 48 hours to effect. I waited for three days and that did not happen. I was told to delink my domain.com from Blogger and relink it once more. Wait for 48 hours and see if that happens. That did not happen.
Saw a video on YouTube and all you have to do isopen your doman.com management settings on Goddayand head over toForwarding at the bottom of the page. From there, ADD FORWARDING TO, type in yourdomain.comwithwww.domain.com(you have to include the wwwin front of your domain.com under forwarding).
Remember to tick "Update my nameservers and DNS settings to support this change."
Save then wait for 5 - 10 minutes and you good to go!