Lies and more lies

I reached out to Vodacom via their Twitter handle as getting to speak to a human through their call centre is such a mission.

My query with Vodacom was if I could migrate my data contract with them. The user on the Twitter handle told me I could. If I do a downward migration I would incur migration charges and if I migrate upwards I would forfeit the reduced subscription I am currently on and pay a higher subscription if which I agreed upon. They than sent me a link of deals I could choose and I responded back and they got someone to call me back, the person who called me than said "oh no sorry, Vodacom do not offer any such migration packages and I was misinformed" This came as a shock as the person on their twitter account was so adamant it could be done and I was advised on the process etc.

So VODACOM can you tell me why does you Twitter handle lie to customers?