Makro Can't Deliver

My experience tells me that everyone should avoid Makro's online order and delivery service at all costs. On 30 September 2018, I ordered a headphone set with a built-in microphone from that retailer. According to their website, delivery should not have taken more than 5 working days, so I should have had the equipment by close of business on 5 October. Today (25 October) I am still waiting for my order to be delivered. As an online English teacher, my income depends on having a headset such as the one I have been trying to get from Makro. Since my old device is showing signs of excessive age, it is urgent that I get a new one. Therefore, I phoned Makro's customer service number on 5 October to find out what was causing the delay. The person I spoke to promised that I would receive my order by the following Tuesday (9 October). When the device was not delivered on that date, I phoned again. This time the telephone representative I spoke to promised to find out what was happening and to phone me at 10 a.m. the next day. I never received that call. A third call, from me to them, led to direct telephonic interactions with Makro's warehouse manager. This man specified a third date, by which time he promised that I would have my headphones. As usual, the promise was broken. When I called again, I asked for a refund. The Makro representative I spoke to s****fully sidestepped my request and told me that she would have someone phone me about the problem. Two or three days later, I received the promised call. The man I spoke to assured me that he would "follow up with the courier". He called again some days later and seemed surprised, but not particularly concerned, that I still hadn't received my order. I told him that, if I didn't receive the headset by close of business today, I would write a negative review of Makro on hellopeter.com. That was at least two days ago. I have heard nothing from him, the courier or anyone else associated with Makro. Do yourselves a favor; don't buy things from Makro online.