Did not honour deal although the delay in signing up was not the customers fault

Vodacom Shop at musgrave centre. I wished to take out a wifi contract which was a black Friday deal. The sign up process was delayed as vodacom had another user with the same ID number as me according to their system. I had to contact Transunion to have them remove this persons details from my ID number. The delay was not my fault, I do not know how vodacom managed to load someone else's details with my ID number. I was told they would still give me the black Fridat deal even though the cut off date had passed. This store did not honour the Black Friday deal and to date has not given me my router - even though I have followed up a few times.