Upgrade / Migration Consultant DECEPTION

I have been a loyal Vodacom customer since 2006/2007. But today I am very disappointed in Vodacom. Or more the sales personnel. A person contacted me wanting to migrate my 3 contracts because 'the old packages were falling away'. After confirming a minimum of 4 times that it will not affect the monthly price I pay, we did the migration. When the debit order went off, it was just over R500 more than usual!! When I called the customer contact center this morning, the very hulpfulL consultant told me that it happens alot. The sales people basically lie to you, to upgrade. I can migrate back, but now I have to pay this for 2 months. It is just over R1000 that I loose, because I was **** TO!! How can you as a company allow this! I insist on a refund!