Worst Courier

I have placed an order with Cotton On, my order was received by them on 30 April. On 05 April I got an sms stating that the driver will be delivering my parcel today. I check the tracking on the site and it says "parcel has left Dawn wing" Here by COB the parcel has still not arrived.. On the sites it says "Dawn Wing will contact you" But they have since not had ANY communication with me. The site then says "parcel has arrived at Dawn wing" This process went on for 3days untill finally "parcel scanned into cage". I furiously phoned their customer care and ask what is going on becuase no one has contacted me and I still have not received anything. She proceeds to say she will mail them and change the times to accommodate business hours as it is a business address in a business park and that it will be delivered 08/05/2020. Chuffed I sit back and carry on. I phoned this morning 08/05/2020 and to my surprise "your order is still in the warehouse cage it will only be delivered on Monday" Apparently according to the customer care operator "the mail the lady sent yesterday was probably dismissed by the night shift packers" She then proceeded to say that the package won't be able to be delivered today as all couriers were already out for the day and she can't put me through to anyone higher up as everyone is out or on night shift. She assured me that it will be Monday but by now I am in utter disbelief that I will receive my parcel of essential goods during this time... There is Noone else to contact, Cotton On also doesn't get back to me.. I am absolutely disgusted and will advise Noone to order from Cotton On untill they use a different courier service. I have placed an order at a different BIGGER online store as well and I must say I got almost same day delivery with no issues at all. So why can't Dawn wing do the same....