Courier guy. Extremely Bad Service

I have sent a parcel via the courier guy As per the tracking Parcel app. The parcel was supposed to be delivered today 23 December 2022. The consignee received a phone call from the driver to advise that the delivery details has changed and that delivery will only be done on Tuesday 27 December 2022. AsI am the person who sent the parcel with delivery instructions. I can say for sure that no changes where made by me relating to the delivery. Tried to contact courier waste of time. As no phones are answered.