Online upgrade request ended up as the creation of new contracts

Asked online for an upgrade on two existing contracts - received three NEW contracts (and NO upgrades) instead; meaning that I have now 5 contracts with Vodacom. They cannot cancelled the contracts, because the so-called three weeks window period has already expired (I only become aware of this 6 weeks after the switch when I received the first invoice). Only option to correct their fault is that I have to prematurely cancel the three new contracts, pay the required penalty for doing so, and then they will attend to my upgrade request.