Unhappy with Nu-season

Good Day i purchased an adjustable posture correctingv belt. when received the box was slightly torn and when openedthe one lower belt was missing, i have sent numerous email requesting them to pick up the item and refund my mones or to deliver the missing belt. To date ive had NO response. Cannot get hold of them via phones, only by email to sales. Please do not order from them. how can an online business run without contact info. is this legal.