Worst customer and account service Sonic Telecoms

Worst customer service and account service from Sonic telecoms. I have been trying to get an answer for a month now on extra debit on my account and no one can answer me. I am sent from pillar to post and when i finally called for the manager, she refused to take my call and passed the message on saying she will look at it and call me tomorrow. For over a month this is all I hear and no answer on my question.