92-year-old terminally ill father faces threats from HMRC debt collectors over £126 tax error due to visual impairment.

92-year-old terminally ill father faces threats from HMRC debt collectors due to a £126 tax error caused by visual impairment. He received 38 auto-generated letters demanding over £4,800 with accumulating interest, despite confirming the correct tax due with an HMRC agent over the phone. All attempts to communicate with HMRC have been ignored.