Vodacom Video ticket

Again buying 1Gb video ticket - after watching youtube for some time - only to realize that my normal expensive data has been depleted, but the video ticket is still unused. Not only does Vodacom keep the 1Gb data which expires at midnight - unused- and my R8, but most of all - deduct my expensive data which I had to use for other business - not watching youtube. What a lot of bull - ****, if you ask me!!! Not very nice Vodacom!!!