Not sure if this is the relevant forum by hey, the competition prize is HiFi afterall!
I was reading the terms and conditions for the competition and number 8 states..
8. Prize-winners will be notified in writing within 6 weeks of the applicable closing date (or such other timeframe as is indicated on the Website). If a prize-winner fails to respond to claim his/her prize within 14 days of receipt of the notification, Haymarket shall be entitled to select an alternative prize-winner. In such circumstances Haymarket shall use reasonable endeavours to notify the alternative prize-winner within nine weeks of the closing date (or such other timeframe as is indicated on the Website).
Is this correspondance via email?