Upgrading data errors

A sales consultant phoned me on the 26th of April to upgrade my current contract to a 10Gig Data contract for R149/month. He told me that it will be activated from the 1st of May 2018. On the morning of the 1st, I did not had any data or Vodacom signal. I phoned Vodacom twice and they told me that you are having problems with your upgrades and because it is a public holiday I will only have a signal again on the 2nd. Yesterday morning, I still don't have any data or signal. I phoned again, the helpdesk guy told me that it is not his problem and I must just wait and that you don't know when everything will be fixed again. It is now the 3rd of May....I still don't have any data or signal!!! The contract that I have with you is my only data. I don't have wifi at home. I now have to buy data at a very expensive rate, because of your errors and then you have the audacity of telling me it is not your problem and that I must just wait!!! As you know, you can't do anything without data!!! I am going to buy 1 Gig of data today and you will refund me the money that I had to spend in order to buy data. Also, if my signal and data is not up and running by end of today, I will cancel my contracts with you. This is the worst service I ever received!!!