Bad service from HomeChoice

It is 4 January 2018. This is the umpteenth time I'm doing this on the same complaint which was still not resolved by HomeChoice or Defy. The Defy fridge I bought through HomeChoice has still not been repaired, collected or replaced. I'm still paying for this broken fridge and absolute no contact from HomeChoice or the technician who came out last year 27 December 2017 and who said he'll be in contact on Friday, 29 December 2017. The part he would have ordered would have arrived by that day. Surely after two months this fridge should have been repaired already. Why is this not resolved yet after two months of asking. Perhaps it's time for legal action.