Sim Swop. Cancellation of Contract

Mom bought a new phone and this required a Nana Sim. Well went to Vodocam only to be told we had to contact RMCS and we battle to get hold them, when we eventually got them - what *********** staff and we waited hrs for the call to be answered. Got authorization letter went back to Vodocom and a week later and still nano sim working. Their company letter head has a tel nr : ***but when you dial this it says no longer exits. We also requested cancellation of contract but to date they have no reference of this - very politely on their call centre data base. My mom is nearly 70 and battling like this and using all her airtime to phone these people and they absolutely just do not care a hoot. Their is no call centre professionalism or can I put you on hold or I am still here - do you mind holding. when you ask for a manager or supervisor they are not there. They cant give their CEO details out as this poor fellow will be flooded with irate callers then.