Suspicious Behaviour

Pay full bouquet subscription every month today my service is cut. I call the call centre to reinstate the subscription as I have paid already the lady insists she wants my ID No, unfortunately due to past experience I refuse to give my ID No to anybody over the phone. I insist there is other ways of verifying who I am and I will send proof of payment but please do not ask for my ID No. Her supervisor then tells me I am being suspicious as to why I don't want to give my ID No. This really aggravates me as I am prepared to give all info other than my ID No which is my right I don't need to be forced to give out personal information if my account is paid. All they need is Proof Of Payment and an account no to reinstate the service. It is more suspicious to me the way they onsist on an ID No.