I usually have such nice agents to speak to and it's always a breeze to get things done and explained but I had a call now with an agent who cut me off while I was speaking and getting visibily annoyed when I asked things

Although we never really enjoy hearing that our clients have been frustrated or disappointed by us, we do appreciate you bringing situations like this to our attention, so that we can immediately improve the service we provide. Your concerns have been sent to our client care team to investigate and address the agent concerned.