Flat screen tv stopped working within 2months

The TV was not bought using an account, it was cash on the 23rd October 2014 and it stopped working and never switched on since the 26th December 2014. Went to the store to report and I was told the people for repairs are not available,closed for holidays until 15 January 2015. Took the tv to Lewis on the 14th January 2015. It has been there from that day until to-date.when I ask for updates I'm told they lost some paper that is required for them to submit, before TV can be attended to. End of January 2015 phoned Lewis head office and I was promised that the matter will be attended to, they took my details and said will be called for updates and I was given a claim number. Never received any call from head office nor the store.On the 28 February 2015 I tried to do follow up again and it's still at the shop and nothing is being done.