Tesco Clubcard holders have complained in their droves that the supermarket's website crashed over the weekend as the deadline loomed to exchange vouchers before rewards were cut by 25%.
Tesco Clubcard customers can double the value of their rewards to spend on some non-food items at the supermarket for the next four weeks, under a scheme that launches on Monday 8 November.
Tesco is revamping its Clubcard loyalty scheme by reducing the rewards available for spending vouchers, but it will continue its 'double' offer on collecting points.
Tesco has offered a lifeline to Clubcard holders in a Christmas saving scheme who feared the loss of airline miles following the loyalty programme's revamp.