Misleading financial information provided

Very dissappointed at the misleading/incorrect information provided. I was called to be offered an upgrade in November and was quoted an amount. Now when doing the upgrade in store I get told I need to pay extra as the contract only expires in April 2019. This meams the info given was finacially incorrect and a waste of my time having to go in store. What is worse...the consultant assisting me also was set that the upgrade is due now...yet the system then showed it as April. He tried covering up by saying they will call clients to offer upgrades 5 months in advance. Not mentioning the extra amounts payable. For a client of Vodacom for 10 years...very dissappointed.