Nestle Sweepstakes with barely any documentation behind it?

So I live in Serbia and I remember a few years ago there was a commercial on TV and it mentioned a Nestle sweepstakes where you could win a trip to the local Nestle factory. I can't find anything about it nowadays though. If I remember correctly on the commercial there was a yellow bus with children on it at one point. Can anyone here find any information about it, or ANYTHING. I remember a golden ticket being mentioned and how the way you would obtain it is by buying Nestle ice cream and then when you got the golden ticket, you would also get a code where you would put it on the website and that is how you would redeem it. That's basically everything I know of, any help or more documentation about it would be great.