Synchrony Financial Credit Card Complaint

Synchrony Financial Credit card department,

Rewards New York

Walmart sent me email promotion on -/-/2016 promising $50.00 e-gift card within 10 days if I applied and was approved for their - through Synchrony Bank. I applied and was approved the same day, -/-/-. I received the MasterCard ending in -. I have not received the $50.00 gift card. When I call Walmart, the only response is that they are working on it. It has been well over 2 months.