I got my husband an easy to use phone and just wanted pay as you go, he only uses it in emergencies so was surprised when the credit ran out after a couple of weeks. Topped it up on August 3rd then received a text acknowledging payment followed by another saying I had a bundle and needed to use it by September 3rd. Realised then why the first £10 had gone so quickly. Had already email O2 telling them my husband only wanted to make calls. Not having received a proper response I email them again they haven't even bothered to acknowledge my email.