Vodacom incompetence

I saw an amazing deal on vodacom and decided to switch back , after 5 years of leaving them(Might I add , I have regretted each passing minute since leaving them). I app**** for the deal online, after three weeks of waiting around for my sim to arrive , I started following up and received word that they somehow lost my online application, in which I specifically asked that I wanted my number to be ported to the vodacom network with the deal. Needless to say i received my sim card a couple of days later, which I was extremely happy about. However the number port was never ported to Vodacom, so I called the after sales,online and porting numbers at vodacom.

The agents advised me that I should cancel the product, get the port switched and then reapply for the deal. The deal was only meant for April, so I was against any cancellation, however the agents reassured me that the opening of deals won't be a problem, and that I have no other choice. I even told them, if there is a small chance of me losing the deal with the cancellation I would rather just keep the existing deal. Once again they reassured me that it would be easy and not a big deal.So naturally i followed their advice,as they are after all Vodacom employee's and want me as a customer. After calling earlier the week & Yesterday, I was informed by the online call center that they would not be opening the deal for me as it was an April deal. I explained the situation to them but according to them they won't be opening any old deals for me.

How did this end up with me being the victim when I only followed the advice of Vodacom Employee's?