Where is my $300 Visa Card reward for sign up with Xfinity? (service began Aug 2021 & have not received Visa card)

Xfinity internet service was installed and activated on 8/22/2021 at which time I was told my $300 Visa prepaid card would be sent to me after payment of 3 billing periods. In late December 2021, after payment of the 3rd billing period, I chatted with Xfinity customer service rep who said I should have been sent the card after 90 days of service. It has now been almost 5 months of service and still nothing has been sent to me and the reward status does not have any record of an incentive or reward.