Angry vodacom customer

On Monday the 2nd of March I upgraded my mom's phone I said I don't want to pay more than about R270 a month so she said I can get this phone the LG w30. And I said she don't need alot of data or minutes. Then sheput the phone on 2gig data package R410 a month this is totally unacceptable now I have to pay more for the phone. I hope vodacom will fix this problem as I'm not willing to pay for more than R270 a month. The number is ending 60 Good bye from a angry customer. And only reply bye email.