Useless Vodacom sales people

I app**** for a uchoose flexi 350 contract - sim only for R249 as on the internet on 9 Feb 2018. After speaking to a lady to try and sim swap my number on 14 Feb 2018, I asked her to just call me back in 5 min and that never happened. I then figured that I wont get the contract anymore. After a few days I noticed that my incoming numbers didn't show anymore. I investigated and saw that it looks like I am on the contract, which was fine. Today I saw that my bank account was debited with R446 (debit date to be last day of the month)I and after calling Vodacom they told me that they charged me R97 connection fee and R349 airtime - WHY!!! According to the contract I only pay R249. The call center person told me that I am charged for the full airtime until end March... when the contract will kick in. I want this cancelled immediately.