Makro online...eternal headaches.

ordered a table tennis table, bats, ***** and net online, order was confirmed 15 May. Delivery was split, received the bats, ***** and net within 3 days. 30 may i received a phone call from makro to say they don't have stock of the table. Was told I would receive my refund within 7 days. Surprise, no refund as yet. Phone the number on their website just to be told its a call centre, the query has been escalated. Email the email address on their website, surprise no reply. Who should I contact for my refund. How could you possibly sell something you don't physically have stock of? Will never buy online from Makro again...lesson learnt.