Pay for 2 handsets after upgrade

Since when do you pay for 2 handsets after a contract upgrade? Contract stop in December but Vodacom let you upgrade 3 months before your contract stop. With your first invoice come the surprise that you have to pay another 3 months for your old phone. First time in 10 cellphone contracts!!!!! And yes, they ask you to upgrade online to skip the admin fees in the store, yip, another surprise, R150 administration fees!!! 15 years with MTN and no such %$$%^, and then this???? Will be the longest 2+2 years with Vodacom. Never again. They will loose all 5 my contracts over the next 2 years, Starting March and then another 3 next December.