Walmart MasterCard Customer Service 

1-888-331-6133

To Activate Card

1-888-779-2977

Report Lost or Stolen Card

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1-888-925-6218

TTY 1-877-763-0997

Hours of Operation 

Monday-Saturday: 8am-10pm (EST)
Sunday: 10am-9pm (EST)

Mailing Address 

Walmart Rewards Mastercard
P.O. Box 187 Orangeville, ON L9W 2Z6

Social Media

Twitter 

Facebook 

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