billing you in erong months

I bought data in feb but it was billed with the Jan invoice. How can vodacom expext me to pay them end of Feb for something I bought in feb. I asked for my itemised billing for Dec and Jan because eventhough I buy data thjere is forever additional charges to my number. This is day light ******* because who buy 10GB a month, how do they justify the billing. I paoid what I know is owing to vodacom, now my phone is off as if I didn't pay a cent. Vodacom rectify ur billing and sent a correct invoice and statement and get my phaone back on line. Not my problem if you incorrectly invoice us.