Highly irratated and dissapointed

<p>I renewed one of my cell phone contracts on 31st july and was told everything would work and they will send through settings. Yesterday the phone stops working and now says "you are not registered on a network" i call customer care and the woman says i have to do a sim swop on a sim card that has worked for 2years. WHY???!!!!! She has no answer and i refuse to do a sim swop on a sim card that has been working for two years and all of a sudden nothing. Not impressed with ridiculous answers and no assistance!!!!</p>