Dissatisfaction, disappointed with Makro services

Makro was running a promotion on a Hisense oven which comes with a solid hob.I ordered online and when they delivered,it was only an oven.I called them, emailed them but they keep telling me that polokwani branch must attend the problem but their always have technical problems.I even have an invoice from them clearly showing what I ordered.The reason I signed for the delivery is that I believed that everything was in that package,only to realized that it was one item after the couriers left.All I want now is for them to deliver the hob or take back their oven and refund my money.