DTDC Courier & Cargo — Non delivery

I have had a parcel sent to my customer and they were asked to go to their office to collect as the address they entered not serviceable.My questions is if the pincode was not serviceable why did the DTDC site first approve of that pincode and moreover it was just 3km from the office. Ehy can't they deliver when the place is so near that means they are not at all customer oriented.Now if their site approved it's their responsibility to have it delivered not like some government office service..The franchise are pathetic set o[censored]nprofessional people. First of all they say no then it's no..they themself asked me to complain as they do not care..n more over there are no company presense n number to raise our concern..the numbers given are not working as well no one responds.. Inspite of telling the customer's issue that they are old people n can not go n collect from office..this is in Alleppey district..