shocking service

After 5 days of being sent away from vodacom stores in musgrave and gateway, I managed to get a sim from pavilion. I mentioned that I'm buying a prepaid nano-sim to port from Cell C and I was told in order for my port to go thru, I insert my card then call 100 then cancel the call and texts from vodacom are sent to me complete the process. Instead, after waiting for 20 minutes while consultants were chatting and others cutting the queue and spending R50 on a SIM card, I get given a new number which is not what I wanted from the get go. I am not changing my cellphone number. Vodacom offers porting and clearly I was instructed poorly. Why do your support staff get in the way of porting instead of just telling customers to refer to the instructions on your website. I am beyond livid. If this isn't rectified I will refer to my rights