UNFULFILLED DELIVERY DATE

I am expecting a parcel which is due to be delivered by end of today, 15/07/2021 as on my tracking updates, I went all out to call DHL twice this morning to notify them that I am travelling and they should ensure I get the parcel today. 4 hours later a lady(Thuso) calls me to say I can't receive parcel today because they are only doing 1 batch of deliveries a day. I ask her if it is possible for me to collect it at DHL myself then she says I should re-arrange delivery online... I ask her to guide me she does not even know how to do it. This is a really terrible service, lack of communication and unfulfilled delivery date as promise.