Randstad Hamilton toll free customer service number : +1-905-528-3400. Randstad Brampton toll free customer service number : +1 905-799-0269. Randstad Burlington Office toll free customer service number : +1 905-637-3575. Randstad Burlington toll free customer service number : +1 905-637-3575. If you as a customer of the Randstad have any query, complaint, suggestion, feedback and reviews related to Randstad products and services then you can communicate through its customer service detail.