A Which? spokesperson said:
“While many companies performed well, it’s disappointing that some of the biggest household names are still failing to meet consumers’ expectations of good customer service.
“Nearly nine in 10 people said they would leave a brand that treated them poorly so it’s clear there can be no room for complacency. Some companies will have to do far more than compete on brand awareness or price alone if they are to retain their customers in these times of financial squeeze.”