Vodacom use misleading upgrade sms's

We have a duel contract for our teenage children at vodacom. Yesterday they received a sms from vodacom informing us that the contract is eligible for a upgrade. Our children was ecstatic! We took time out of our busy schedules to go to the nearest vodacom store. After filling out the whole online document the sales consultant informed us that because the contract is supposed to end in November, we will be liable for the remaining amount on the contract until November. So we will have to pay DOUBLE every month until November! So we asked him how this was possible, after we received a sms from the saying that we could upgrade?! He said that Vodacom does this as a sales gimmick, to get customers in the stores! So we had to tell our children that Vodacom made **** to us and that they have to wait until November for a new phone. What a way to play with a teenagers emotions! Totally cruel! Vodacom uses misleading sms's! Because of this, Vodacom convinced us to rather end the contract in November and go to another service provider. Well done Vodacom! You just lost a upgrade and new contract deals!