Pathetic service

Bad Service, I recently upgraded my contract and my debit order has gone off. I have called your contact centre numerous time no one is willing to assist. I was told to send my banking details which you have on the system to the vetting department 7 days ago which I did but I am yet to recieve feedback. I am not happy at all with the service your agents proved, they are rude and they keep placing me on hold when I need to speak to a supervisor. I regret the day I decided to renew my contract with you. I am spending my time on the phone talking to people that are just not willing to help me in anyway.