Was there a rebate for them? If there was did you click them 1st then shop? Did you click it in the right walmart if you shopped walmart grocery pick up delivery it should be clicked in the walmart pick up delivery option if you did in store it should be clicked in the in store walmart option. Linked normally takes up to 48 hours to credit but people have said 3 to 5 days some longer if there was a rebate for the items and you go what the fine print said.
