Wesbank is the most *********** bank I've had to deal with

Wesbank is the most *********** bank I've had to deal with. Every year they deduct my payment on the 17th of December and we only get paid on the 20th of December. I phoned them in October to tell them to please make it the 20th of December as I get penalized for using my whole overdraft for this BS, and true to their incompetence they again deducted it on the 17th using my overdraft. Are they only employing *********** people or is this done on purpose????