I cancelled the DD in August 22 when our bill inexplicably went from £5 per month to £34.51 without explanation. we have been billed multiple time for £55 per month late payments. In addition, an interest rate that appears to be 250% on the £16 standing has been applied. During the complaint procedure Castle water continued to charge and instructed a debt collection agency add £336 to the bill. Despite having no water usage, only a standing water charge - which was paid up to date, they continue to compound the interest and chase the debt which now exceeds £700. AT NO POINT DID THEY ENGAGE IN RESOLUTION.