Poor service by a supervisor

Terrible service from the call center! After asking to speak to a supervisor the call was dropped. They did call back eventually which I appreciate, but the supervisor continued to argue with me in a hostile and arrogant manner never trying to fully understand my question. Eventually after 15 minutes of going around in circles the supervisor finally managed to listen to the question and as it turns out can provide the information that I was looking for. I am trouble by the hostility and aggression that the call was dealt with prior to actually having any knowledge of the question be asked