Data

I am a loyal client to vodacom but I am treated like a dirt cleaning mat. See I had 800+mb of data left which I would use when out of my house. I have a contract sim getting 20gb data from vodacom. See my problem with vodacom is that they are skelems business mafias. I did not opt in to use my airtime even when my data is finished but they activated it behind my back. I cancelled it recently after learning about it. MY QUESTION IS WERE DID MY DATA GO BECAUSE I USE WIFI AT HOME? WHY I WAS ACTIVATED TO USE MY AIRRTIME WHEN MY DATA IS DEPLETED? THIS WILL BE REPORTED YO COMMUNICATION MINISTER AND OTHER MEDIA PLATFORMS.