Smart M account never changed to uChoose Flexi 200

My father spoke to Vodacom on the 10th of February 2015, to have a Smart M contact changed to a uChoose Flexi 200. The lady that helped my father said that this was possible, but that a quoted amount of R518 and some cents needs to be payed for this to take place. My father asked if it was possible to have the amount paid at the end of February 2015. The lady said that it would be fine. So, at the end of the month an extra amount of R520 was paid to change the account from a Smart M to a uChoose Flexi 200. On the 10th of February 2015, the lady that my father spoke with, confirmed that the change on the contact will be from the 1st of March 2015. This did not happened, after phoning to find out why - my father was told that it will take effect from the 1st of April 2015. This also did not happen and nothing has happened since, except for Vodacom to go up with their rates. Now the Smart M contract will come up for it's upgrading period from the 3rd of June 2015. The extra R520 paid to Vodacom at the end of February just disappeared. Vodacom has never had the decency to pay it back or just even mention it. Can this money please be paid back as soon as possible?