I have recently upgraded my o2 contract and unfortunately did it through car phone warehouse,ever since I have been driven mad with cold calls from them using diverted numbers, I only know this as after 2 weeks of non stop unsolicited calls fom various numbers I decided to answer, it was a 01922 code which is Walsall, but when I questioned the caller he stated he was from a subsidiary of car phone warehouse and was calling from Bristol! After insisting I speak to a manager he confirmed that they use divert numbers as if they used their own people would not answer! I also answered a call from a Loughborough code guess what! A Birmingham nos ...again!!! Sick of asking to not be contacted with no result, advice avoid avoid avoid...