Unnessecary Callout Billing for a line replacement

<p>I recently had a poor ADSL connectivity issue being sorted by a line replacement that was done by a technician after a previous technician incorrectly assesed the fault as the modem (which im still using successfully after line replacement). I was credited for Service Interruption's but now I'm being billed for "Unnecessary Call-out Fee" which I dont understand since it was an actual line fault. I previously requested that this be removed off my account. Can we please get this sorted? As a side note I still cannot access my account online after being promised that it should work after "changes" made.</p>