Starbucks has come under fire from its customers after changing the terms of its loyalty scheme.
The coffee shop chain's existing rewards card has been altered, offering a free drink for every 15 transactions but axing other incentives such as discounts on filter coffees.
Hundreds of customers have flocked to complain, using the chain's Facebook site to make their views known.
But Starbucks says there has been a "positive movement towards the My Rewards scheme" which gives customers a "star" for every transaction. Customers, however, say it....