Can't switch numbers

I went to your store in Nelson Mandela square on Tuesday to port my number from Cell C prepaid to Vodacom prepaid - 1st problem is that this is still not done. Phone says this SIM is not allowed to register on this network. 2nd problem is that as soon as I inserted the SIM it started installing software on my phone, changed my loading screen to you fugly logo and even changed the sounds/tones. There's an annoying popup to switch on mobile data. At no point did I consent to this. The phone was bought from my previous provider and already paid off i.e. I own it. I have sole discretion on what is installed on my phone and your not allowed to make it a condition of using your service. 1) You need to activate my SIM TODAY. 2) Your practice to auto install software needs to stop or else I'll need to talk to the ombudsman or ICASA or both.