Does not understand how to use cellphone technology for updating or confirming suitable delivery days

The 1st time I used this service was through an online platform. I received an email, parcel shipped.... 3 to 4 days later, parcel out for delivery. 2nd time I had to use this service unknowingly. I requested Postnet to Postnet service but the courier guy was used instead to deliver to Postnet looking for me.... ridiculous! No warning nothing! Just an email, parcel rejected at Postnet due to no contact number....

Don't assume people sit at home playing with their thumbs waiting for the courier guy to magically appear.... They work for their money. Confirm delivery dates and expected delivery frames. If you can't do this, drop the parcel off at your pick-up box and tell your customer to collect at the nearest box with PIN. EASY!