Poor Service Delivery

I purchased goods on Tuesday 15/12/2020 and specifically paid the extra cost of Express courier to have it delivered within 24 to 36 hours as i purchased a memory card and needed it for the weekend flying. It is now Friday and still waiting. I had to phone DroneWorld to actually ask for a Waybill so i could try find out were my parcel was. In fairness the lady phoned me back to say it was in transit but i had already contacted the courier branch to find out for myself. It is apparently arriving on Saturday afternoon now. On the same day 15/12/2020, i bought drone parts from another place called Cyberrange and because i bought 'X" amount value they sent the stock for free, and this arrived on Thursday morning first thing. So me paying the extra R 200 for express courier from Droneworld i find just ridiculous. Its not the amount i paid that upsets me, its the principle of it. When you charge extra for something then make sure its done as stated. (This is the first time i have bought goods from either store)