How does Instagram ShakeUp Summer Data work?

Dear Vodacom. I really wish there was another way to contact you other than this. I tried phoning the customer care number twice and I choose the "chat with someone" option. After a while, the voice recording says "Press * to go back to the main menu" or "you may hang up now". I chose to not hang up or listen again to the voice recording options since I was sure none there covers my question. But then Vodacom hung up on me. Twice. I was willing to wait in line for an agent, but I was hung up. Then I tried Tobi, the robot again. Tobi, your robot asked me to type my question and then said "oops! Undefined." So here I am again on Hellopeter. For lack of any other way of communicating. My question is: ShakeUp summer is big fun and like opening a little present every day. Yesterday I won 1 Gig Instagram. For one day. Yay!!! (The second time I won it.) Like the previous time though, every time I use Instagram my Any Time Data steadily depletes while the 1Gig Instagram data remains unmoved at 1Gig. I monitored it both times that I won the Instagram data and both times Instagram ate up my Any Time Data and then the day ended with 1Gig Instagram data untouched. It is strange because when I win Facebook data or Social Ticket data, that data goes of first when I am on FB, and only when that data is depleted, then the normal Any Time Data runs on again. Is this a glitch in the system or am I supposed to first use the 3G Any Time Data I still have for the month, (in one day) before I can access the free Gig Instagram data that expires within one day? The number I won the Instagram data on, is a router sim, number *** Anyway, thank you, Vodacom for the ShakeUp Summer gifts and for always responding to questions on Hellopeter. So, I am just wondering how this Instagram data works? And maybe Vodacom should work on a better customer care system for customer questions, I'm sure much fewer queries will end up on Hellopeter.