Vodacom store updating their system incorrectly

On the 16th of march I upgraded my cellphone contract to a smart S @R699pm for the Samsung S7 edge. They explained to me that I needed to wait for the new month to see the changes. The following week I needed the breakdown of the package and the cost with insurance when I realized that they put the incorrect information on their system and that the incorrect package was captured. I immediately phoned them and they could not assist as their systems was down due to upgrading . I phoned back later and spoke to they store manager and she tried to assist me as Diane that assisted me was not at the office. When I went in to the Vodacom site I could also see that a u choose Smart L package was loaded. I have been in contact with them ever since then to correct this problem yet nothing has been done I have no idea what is happening to my account, and I don't know when everything will be viewable/correct on my account. My caller is is still not working . This has been the worse service I have had from a Vodacom . This is a breach of contract as the information that was given to the shop assistant was not captured. I have been following up every single day. Please advise urgently