Data pricing/ airtime advance from Vodacom

Vodacom's data prices have been doubled since end May. I have been using the options on Just for you Town 1G at R29 for a week, for months... And at end of May, this option has been removed.... Apparently my taailor made offers have changed as I now have to pay R80 for 1G for a week. So now, I've to check what offers are available and of course affordable for me. I make use of the app and get various offers on the Shake!up. During this week, I bought 100mb data, for R3... and then I received a sms that R4 airtime advance will be deducted with my next recharge... I have not taken/used airtime advance option at all.After numerous message via messenger, no support at cuatomer service ,I had to report it on Facebook to be heard. Vodacom recharged my account with this R4, within minutes of my post. Today, 26/07, I recharged with R50, bought 500mb at R10... and 1) I received a message that the R4 has now been deducted and once again ,2) the that R11 will be deducted with my next recharge... And the attitude via messenger... hang tight, ourteam will make contact with you... If this is happening to other people as well , how much money is not being deducted from the recharge?