Very rude swearing delivery person

I received a package from the branch in Mossel bay. I’ve never had any problems with this company but yesterday I was very disappointed in the attitude of 1 delivery personnel. He was very rude towards me so I reacted by saying to him he is very rude. He was mumbling and told me to sign, never saying hi or looking at me while he was mumbling. Well he was mumbling when he left so I asked him what his problem is he started swearing at me, you won’t believe what he said to me. F**k you. I was flabbergasted and phoned the branch head but I couldn’t get any real answers from him and really just brushing me off. Till now I haven’t received any response from the branch manager or the delivery person. I really think this is a terrible picture of the company and they have lost me as a customer. I also use to work with public which were actually swearing at me, in the phone and to my face, but I backchat or swear at them