"the victim of identity theft perpetrated by Carphone Warehouse"
Carphone Whorehouse did not try to steal your identity. Maybe, just maybe, one member of staff did. More likely, it's that someone else tried to steal your details and use them to buy a phone from CPW - unlocked phones can be fenced for good value at high speed, and CPW are the best high street vendor. That happened to me about 11 years ago, and while I've never shopped at CPW for more than a case, I've never blamed them either.