Advice
It is best that whatever department you work in, you make an effort to get along with your co-workers. A customer can ruin your day but you may never see them again, but a co-worker can ruin your day and you have to see them again the very next day. If problems occur with a co-worker try to dispute them in a professional manner. If complications continue, consider asking upper management for a sit-down between the both of you, or if possible request a switch to another department within the store. Teamwork is very important to make the day go smoothly, the work itself is already tiring enough, don't let drama with other co-workers add to the burden.