HBL helpline complain issue

I have been trying to contact hbl through their helpline tirelessly and I literally feel like someone picks up my call and then drops it before I even get to speak and then they ask me to rate their service that they usually ask after talking to an agent. It has been happening to me since the last week and I don't know why they're doing it. This has happened to me no less than 5 times. Is there somewhere i can lodge my complain?