Just WOW bad service

Waiting on a parcel which has now been two days on the courier vehicle out for delivery. Get notification that my delivery address is "unclear" however I have seen their vehicles in our office park more than once over the years. Do not know how to even make it easier for them - gave them street address, office park name, building number, area, company name as well as on which floor the company is situated. I do not understand how difficult that must be not to read that properly, as google maps as well as the gps on all our phones in our office shows exactly where we are situated