REGRET OPENING AN ACCOUNT WITH VODACOM

I have opened a new cellphone contract with Vodacom on Thursday the 29th of January 2015. The person assisting me said I would need a new SIM card for the contract (money scheme). Documentation was filled out and during that, another person working there said there's no need for a new SIM, I can use my current pre-paid SIM. The person helping me was present and agreed. Documentation was said away with the new SIM card info and now I'm connected to that SIM. That SIM was placed back on the shelve in the shop, and was sold to another customer. So now for 5 days I have NO network or any services. If people try to phone me, apparently someone else is answering. I have spoken to 3 different people when phoning customer service, and no one could assist me. The one person kept me on the line for over 10 minutes without assisting me. I went back to the shop yesterday the 4th of February 2015 and they said I will be connected this morning, the 5th. And what do you know. still nothing. I think it's pathetic service from Vodacom and their staff's side. I regret opening an account with them and if I can, I would stop it immediately and go elsewhere.