Complaint against Extremely rude Sales Consultant Anna

I spoke to Anna from Sales Department yesterday, requesting to speak to Adrian Roux to follow up on feedback regarding getting my line re-instated after incorrect termination, however Anna was extremely rude and unprofessional. She kept asking me whether I've paid up my account, how much I'm paying, and she rudely said that I know nothing about how a call centre works. She raised her voice at me, she was sarcastic and spiteful, and incredibly unprofessional especially in addressing a customer who required assistance in re-instating my Fibre line. I called in this afternoon again a few minutes ago, requesting to speak to Adrian again, however I was put through to Anna, who again was rude, and unprofessional. I would like to escalate this matter as this is a very poor representation on the company specifically regarding servicing its customers.