Vodacom Charging me for a **** load of money because i recharge my account

Every month on my statement there is a section that says add to bill recharges ? first they told me it was airtime advances but i do not take airtime advance on my phone then i phoned back and the lady was rude KEEP ON SAYING OH MY WORD to me because she says i get charged every time i recharge my number for what??????????????? you guys are sucking the life out of the clients really, my husband has a contract with Vodacom we are recharging way more than i recharge on my number he does not get charge ?????????? i want this fixed every month they keep on telling me it is airtime advances last month i paid R47 towards that ... please stop this and rectify why does Vodacom also want to charge me for recharging my account. i want this cancelled this is bull****.