Makro online system poorly managed. No customer care at all.

I bought Ink Jet Cartridges online Feb 7 2025.. The order was accepted. The tracking service confirmed item was packaged but not yet picked up by the courier. Delivery date was no later than Feb 14 2025. The delivery date came and went. The tracking system still stated delivery for the 14th Feb. I contacted Makro several times through various channels. Eventually I was told On the 20th Feb there is no stock and they would refund my payment. I am still waiting for my refund. In the mean time the item I ordered is still available for purchase, even though they told me it was out of stock. I don't trust Makro. They have my money since Feb 7 until now. What kind of business are they running?