If you want to contact blogger/blogspot team for any of the reasons written below.
Your blog is locked
Your blog is deleted
Report a bug to blogger or suggest some new feature to blogger.
Please check the bellow links to do the same.
These following links will tell you about
How to Suggest new things that needs to be implemented in Blogger, How to participate in Blogger Discussions and Supports, How to find any help required from Blogger Team. How to report any problem to Blogger Team
Contact Blogger support for account and TOS (Terms of Service) issues via Blogger Support Contact Form
You can post request on Google Blogger Help group. Here many independent blogger as well as blogger team are ready to solve your problem.
There is one more private group of blogger where bloggers like me are providing support for issues related to blogger Blogger General Discussions.
If you want to have some new feature request then go to Blogger Wishlist