bad service and stinking attitude

i am very disappointed with the service rendered by a very *********** and very rude agent by the name of Jo-Anne Goliath and i requested to speak to the team leader and she told me that the team leader is busy to take my call imagine the nerve and if clients wants to submit formal complaint they don't even have a complaints department what nonsense is that like really. They bill clients incorrectly and yet they don't want to take responsibility and we forced to deal with the likes of Jo-Anne goliath i don't understand why the company still has that girl she is useless to say the least.