St Courier — delivery person

Hi,
I recently had a package that had to be delivered to me. I was not able to pick the call from delivery person, so my package was undelivered. I called him back the next morning (21/03/2019). The way he spoke was very unprofessional and rude. This is the worst customer service i have ever experienced. His tone and sentences were very unprofessional. I want you to take this complaint very seriously and take action against that person - mr. Elangovan (West tambaram delivery). If this continues, your business will drop. Please teach your employees the value of customer service and how to be polite with customers. Also, i suggest that atleast two attempts should be made before you ask the customers to come and pick up the delivery themselves. I hope this complaint will not be ignored.