Rude Agents

I called in to query the invoice dated 30/11/2024. I am told im charged extra because i have levelled up my data. I informed the agent that im not aware of this change and I would like for the invoice to be credited. He tells me that I should call back and get someone to assist me. I'm telling him that I'm already talking to him, why cant he help me. I got upset and told him to escalate while i was on the phone or get someone to call me. He told me that thats why i have a problem with my billing because i dont listen. I hung up the call. Please cancel this!! And don't debit my account anymore