Data billing+usage change

1. July's (current Month) data is not shown on accounts of vodafone usb modem- only previous month. Call center states Vodac policy changed. Also informed me:2. Vodacom now FIRST uses current month's data (which ballance I now cannot view), not previous month's left over as has been done since I started previous contract and up to now (Vodacom can verify this from their records). Only now. When trying to explain this to call center, I was rudely interrupted repeatedly + told this use of current month before previous month's data is in contract. This basically means data only valid for one month as I normally have data left at each monthend and therefor will lose data every month from previous month. Also tried Vodacom internet site- enquiry ignored