Vodacom cellphone contract blocked because of computer generated security questions

I was applying for a Vodacom contract of R199 and was approved yesterday and the consultant said I must answer all calls today from Vodacom to be able to proceed with my application otherwise it would be cancelled. A consultant just called me back and asked me computer generated security questions that I answered correctly and then I was blocked so now I can't get my approved cellphone contract anymore and she said I must go to the Vodacom shop with my ID and start the whole process all over again. This is ridiculous and very bad customer service. I was looking forward to getting my new phone this week and now I have to start all over.