I purchased the license of photoshop & lightroom for 1 year I guess it has been double paid. I would like to cancel the 1 of double payment. Where can i find the license?

You are likely going to have to contact Adobe Support directly by chat or phone when they are available.

Manage your membership and payments | Creative Cloud

https://helpx.adobe.com/x-productkb/policy-pricing/membership-subscription-troubleshooting-creative-cloud.html

For the link below click the Still Need Help? option in the blue area at the bottom and choose the chat option...

Creative Cloud support (all Creative Cloud customer service issues)
http://helpx.adobe.com/x-productkb/global/service-ccm.html ( http://adobe.ly/19llvMN )