By Harry Leach A sick ex-landlord is being hounded by debt collectors over a council tax bill from 18 years ago. Deen Adam was shocked to receive a letter from an agency, working for Birmingham City Council, asking him to pay £514 for supposed missed payments in 2006. The dad said he was “astounded” and “angry” at the council’s “audacity”. He wondered why the cash-strapped authority had decided to chase him for the old bill instead of his former tenants who lived at the address in Runcorn Road, Balsall Heath. Mr Adam, who has long-term health problems, said he was finding it hard to make a hot…