When the driver entered the shop, his first words to me were, "Where is your phone

When the driver entered the shop, his first words to me were, "Where is your phone?" I explained that my phone was currently on charge because the battery was flat. He then questioned me as to why I was not using my phone and stated that he had tried to call me. I explained that the delivery/location instructions provided were clear. Despite this, his manner remained extremely rude and arrogant. The driver then told me that if I did not answer my phone, he would simply return the parcel. I found the way he spoke to me completely inappropriate and unacceptable, particularly when dealing with a customer. What concerns me further is that a client who was present in my shop actually confronted the driver about his rude attitude towards me. This was therefore not simply a misunderstanding from my side; another person present also noticed the way he was behaving. Shocking customer service from the driver.