It's the worst ever service I've received from any company. DO NOT USE CARPHONE WAREHOUSE. I bought a mobile wifi device less than a month ago. Can't get the signal at home and hence went to store to return it within 14 days, but store did not take it asking me to call a customer service team to arrange for returns. when I called customer service team they said I can't return via phone and can only drop into store. Store now gave me a different number to call. Due to this ping pong game by carphone warehouse store in Ilford I was over 14 days and now they are asking me to pay for another month before cancelling though I can't use it as they don't have coverage. I was misguided by the Ilford store team as apparently they are supposed to take returns in store. Now, I'm still unable to cancel the subscription as their system is down.