Elderly person charged for extra line after PORT

Hi I am writing this report on brhalf of my father,he was offered a contract phone by Cell C and they then ported the number from Vodacom to Cell C. But now he has to foot the bill everymonth for a number that he is not even using,how can you do this to the elderly people. His number is *** and the number that he is paying for every month is ***,he has reported it and a ref number was given but still nothing has been done. *** - DISGUSTED!!! please can you help get this sorted out!