Walmart's customer service hours were typically aligned with the regular store hours. Generally, Walmart Supercenters are open 24 hours a day, seven days a week, while some smaller Walmart stores have specific operating hours.
However, it's important to note that store hours can change due to various factors such as holidays, special events, or company policies. To find the most up-to-date and accurate information about Walmart's customer service hours for a specific location, I recommend checking directly with your local Walmart store. You can find their operating hours on their official website or by giving them a call.