Utter disgrace service from Vodacom

Bought a prepaid yearly bundle at Vodacom last year in July ,haven't used the SIM card in about a month..today when I wanted to use the SIM card there was no data on the simcard ..called they're customer care and the lady told me that they basically recycled my number and gave it to someone else...I haven't even used my data on the sim ...and I paid R899 in store for the yearly bundle... to me this seems utterly unfair and very wrong of Vodacom ...I call this theft ..because I spend money on something I haven't used ...