Dashlane has its own customer support central where you can find answers to most common questions: https://support.dashlane.com/hc/en-us. If you need help with your redeem code, please contact [email protected]
You can also contact Dashlane support by writing an email to [email protected]. Dashlane also offers live chat support. Go to the bottom of the page: https://support.dashlane.com/hc/en-us and find the message button.