Makro On Line fails to deliver

I ordered a CBI timer on the 16th March (O/No.OD***) The delivery was given as the 21st March. To date I have not received. I have contacted Customer Care 5 times and every time I get the same response "thank you for contacting us" "we have escalated the matter" but nothing as to when I will receive the item or a refund. MAKRO you really shouldn't advertise vendors items if they cannot deliver. It shines a dim light on your budsiness.