Online order disappointment

A friend advised I should make use of the Mr Price app and rather order online as there are always specials available and also a lot more convenient as I work in a call centre and do not have time to go to the shop. I placed my order the past weekend and paid the extra R60 to have it delivered within 3 days. I only received a call owhole esday to confirm the order and then spoke to a consultant via the online chat who advised that if the order is not delivered by tomorrow( Thursday ) I will have to wait untill Monday since Friday is a public holiday. Such annoying feedback, if I knew this would happen I could rather have selected the R5 delivery fee. If I was called on Monday the order would have been delivered by today. I REALLY hope I receive the order by tomorrow and not next week. Should it only be next week I have a good mind to send the order back and rather get a refund. It's only R60 but damn, online shopping is supposed to be convenient not a drag