Migration not processed even after sms confirmation that it was processed on 23 Sept

I requested migration for my data line on 23 September. The consultant confirmed that the migration will be effected. I received an sms from Vodacom that the migration has been processed on 23 September as well as the subscription amount.

But on 4 November when i called again, i was informed that the migration was not processed, causing me to pay a lot of money for October, and even for November. Now it will only kick in on 1 December - what i dont understand is why i must be be made to suffer the financial consequences due to incompetency of the vodacom consultant.