By Jack Mendel Tesco has reminded 2m of its customers to spend up-to £13m in unclaimed vouchers before they expire in a bid to battle the cost of living crisis this Christmas. The retail giant’s friendly nudge to almost 2 million people comes as the cost of living continues to bite, and many look to save money ahead of the festive period. Earlier this month, supermarket announced the price of its meal deal was increasing as the cost of preparing the food had gone up. It is increasing from £3 to £3.40 for Clubcard members, and £3.50 to £3.90 for ordinary consumers. Vouchers issued in November 2…