E-mail received about prepaid card

I received an email with the following message:

Action Required

We noticed you never activated your Virtual Prepaid Mastercard we previously sent you.

Click below, enter your activation code, and follow the onscreen instructions to claim your $180.00  prepaid card before it expires.

I wasn’t sure if this was spam. I checked your website https://www.xfinityincentivetracker.com/results and it does state I am due this prepaid card. However, the URL is not available. How can I be sure this isn’t spam and if it isn’t, how can I collect the prepaid card?