Unprofessional conduct from DHL delivery staff

I had a delivery made from the US to my apartment in Johannesburg. While there were no issues with the delivery (timeliness, correct item, ect), I took issue to a comment the staff member made to me.

He asked me whether I will be at home in December. Not knowing how to answer this (as this is none of his business), I said yes and asked him why. He pointed to my watch and told me he is coming to get it in December.

I laid a complaint with Senzebile (supervisor at the DHL customer care). She provided me with feedback after contacting the facility leader from which the employee is from. The facility leader spoke to the employee who informed him that this was a joke.

Nevertheless, I do not find this funny. I find such a comment unprofessional and insensitive in a country that has an extremely high crime rate. I do not feel that it being referred to as a "joke" excuses this. I would like some accountability for this an for it not to be dismissed as a "joke". I found this highly offensive and insensitive. My waybill number is ********** 076.