Disgusting and careless - lack of service

I have a problem with my billing.<br> I was charged more that my top ammount is. On quering this I was told it was out of bundle calls, which as I have explained is impossible as at the end of June I had several minutes available.<br> Every time I have spoken to somebody I am told they will research it or hand it over to the next department and somebody will contact me in the next 24 to 48 hours and this DOES NOT HAPPEN.<br> <br> i had a previous issue which I put on hello Peter which was sorted out. This is a different issue that is ongoing.<br> <br> I even spoke to a supervisor who promised they will call back, which I should not have believed because I have not received anything back.<br> <br> This company has over charged me, and by not giving me a proper explanation as to where these costs are from or not calling me back demonstrates exactly what they feel about customer service - IT IS NON EXISTENT.<br> <br> This is unecceptable service.