Vodacom is giving me a headache

<p>This is the 3rd month i had to report data disappearing at vodacom. they dont even bother to return calls or service requests. just say matter resolved. I did a simswop and it went well for a few weeeks and guess what my problem stared all over again. when i phoned vodacom they say it is internet. my phone say it is whatsapp. according to my phone i used 560 mb of data in one day. </p>