A vulnerable gran with memory issues was falsely issued a whopping £7k bill a month - an error that her son claims could have cost her life.
Her son has now slammed British Gas after his elderly mum was sent the devastating letter, revealing that another family member has previously committed suicide due to the stresses of mounting bills.
He has now also questioned why the letter, with the error, was allowed to be sent to his mum in the first place.
