Bad customer care from agent!

Bad call centre service and bad SERVICE! I called customer care today 08/02/2022 @ 20h00 I was on the call for 20 mins waiting for call center agent. Eventually I got through to an agent named Tom. Not sure if that's his real name. While talking to me and he was also speaking in the back round and had a conversation with whoever on his side. While I'm waiting to be assisted. He asked for my ID number several times after I gave it to him. I told him that his on the phone and he can't be having conversation in the backround and he put the phone down.. I would like to report him and the company should go back to the call because their calls are being recorded. My problem still was not solve I tried calling again after and waited another 15minutes and decided to hang up. How do I get to complain about this agent?