lack of customer service

the 21 may 2015, I called vodacom requesting that I needed to change my contract from Smart S to 2GB top up bundles and I was assured that this would be done and all I needed to do was to pay R1795.00 and would be migrated by 1 June 2015. This never happened although I was charged the migration fee, can someone help as tomorrow is the 01 July and this needs to be done ASAP?