I need someone to contact me ASAP to resolve this

I have completed an online contact form for someone to call me & have called your customer care line numerous times, even getting cut-off mid-sentence with no resolution!! I paid my July bill manually on 30 June, you then also debited my account again yesterday for a greater amount?? I need someone to call me ASAP to explain what is going on! In the meantime I also keep getting automated calls saying my account is in arrears, when it's not??! If this is the accuracy of your invoicing system I shudder to think what else is faulty....