SIM SWOPE

good day im contacting you on behalf of my sister as we have dealt with our cellphone service provider regarding a sim swop which was handed into them via telephone on the 18th august and up till now we havent recieved any feed back, i have recevied an sms stating that our account is in arreas which is not as i personally made an payment on her behalf.<br> she isnow feed up of calling every single day and no response. i would appreciate your help in this matter<br> <br> regards<br> Tasneem