When applying for a refund for overpayment of a service charge, check your rent account transactions. Over £500 was deducted from my rent account by "Unknown information" two days before that same amount was credited into my bank account for over £500 overpayment of a service charge. One month on and my rent account balance is still down by over £500. I was was told by the Customer Accounts Specialist who was dealing with my case that if I don't want the refund I can return it and it could go toward my rent. I then missed a call from him and when I mailed him to find out what he had called to tell me, he mailed back without telling me why he had called. He has since referred my case back to his department. As for his manager, she has only ever said I should not contact her but go through the proper channels. I've been a tenant since they took over from C33. And I've asked for rent statements dating back 5 years to see how many, if any, times "Unknown information" has deducted funds from my rent account. And I've yet to be told who, or what "Unknown information is and who authorised these transactions...