Bad service on delivery

I bought some deals which were supposed to be delivered today. When I bought it, it said 15th and that suited us. They changed and came last week when we were not at home. I could not re-schedule as the system does not work. It said oops, there is a problem when you try to set a new delivery date. My order has been returned and I can no longer get those deals. Also, I bought the items for a b-day, not I have no presence! Miss Leletu.G at Takealot said the delivery attempts were valid so my order will not be replaced and delivered today. How is the attempt valid, it is the wrong date, and no way to give a correct delivery date as was agreed on a purchase. This is bad service, very disappointing.