Dissatisfaction with the conduct of one of your staff members

I bought a vehicle from a car dealership, and as appreciation they gave me 2 months free insurance with King Price and I made use of the facility, as nothing is for free in this country. Now 2 months is over, and I cancelled the policy. The representative I spoke with, displayed a rude and dismissive attitude. I'm still shocked at this person's behavior, telling me that I was only using King Price and he want to give me a new premium which is still higher as the company I signed up with. I told him he can't speak to me like that, as I'm the customer, but that's probably the way he operates, as he only continued with the call. If I claimed in the past two months, I would say he had a foot to stand on, but I didn't claim anything or didn't make use of any facility they had to offer. King Price, you must check the attitudes of your representatives, they will cost you clients, and I will never make use of your services again, and I will definitely not recommend King Price to anyone.