Vodacom Agents Giving conflicting information

I was called by Vodacom and told that my contract was up for renewal in July. When i got there to renew, i was told ooh sorry your contract is up for renewal in December, so i opted to renew anyways and had to pay top up amounts up to December. I was receiving calls already to renew, but when i went to a Vodacom outlet, was told these numbers are not due for an upgrade.

I received a 30Gig data bundle at renewal, which was taken away after 1 month. I feel that this is not fair.