unhappy about contract details

Good day, In May 2019 a telesales agent from Vodacom gave me a call stating that my data contract (on ***) with Vodacom is about to expire and that they would like to offer me this wonderful deal where I get 20gig of data which 10gig is for during the day and 10 gig for night owl for only R150 per month l. I upgraded to this new deal with much excitement. He read all the T&C to me, never did he mention once that I will have to pay a admin fee of R149.99. On Saturday (29.06.2019) I went on my bank and notice that Vodacom debited my bank with R585, with great shock I phoned the call centre to query my account, well the call centre agent informed me that there was an admin fee of R149.99 which I haven’t been informed of and then I get an even bigger shock I`m paying for insurance, insurance for what??? To insure my data?? Cause this is only a data contract on ***. So I asks the lady to cancel the insurance and I need a refund on the R149.99 cause that has never been disclosed to me, I even told her that Vodacom can retrieve that phone she said it won`t be necessary she will escalate query and that I should wait till end of July for my credit note to reflect on my statement. Well I need Vodacom to reimburse me for the insurance and the admin fee of R149.99, which I think it`s fair since they`ve debited my account they can pay it back. If this matter can`t be resolved I need Vodacom to cancel my data contract, I can’t foresee any problems cancelling contract as I don’t have a device on this specific contract.

Thank you. Regards.

SL.Fortuin