Why was I harassed over a water bill that’s nothing to do with me?

Castle Water sent me bills at the wrong house number when I’m a Thames Water customerCan you please stop Castle Water harassing me to pay bills for a next door property which is nothing to do with me. I live at number 26 and pay Thames Water. For some unexplained reason, Castle believes I live at 25, and keeps sending me bills there which my neighbour passes on. Despite me repeatedly telling the firm there is a mistake, debt collectors have insisted I owe £567 and threaten additional