Unprofessional and ********** service

Received notification parcel will be delivered today 8-5pm. At 3.30pm phoned courierit customer services to confirm if parcel is still being delivered today. Was put on hold by consultant who was unprofessional and careless about hold. Informed me afterwards that parcel will not be deliver today. What if I waited till 5 pm??? They don't have the decency notifying their customers of changes nor consider that the times 8am-5pm is too lengthy to wait for parcels that might not arrived as in my case. Why should customers call????