Contract duplication

I recently did an upgrade on *** number.. And i called in to be assisted to avoid making a mistake like I did before. Only for the sales lady to offer me a data sim which i took. She then did a double order on the data contraxt and both simscards were delivered. I called vodacom and told them am not opening the other sim card can they check what the problem could be. The lady on the phone said she will request a cancellation. To my surprise the line was activated a few hours later and added to my contract. That i cannot afford and did not request please cancel it the package is still un opened.. I cannot honestly have so many contracts that i cannot afford.