I still haven't bought any
And, while the time period ended 6 days ago, I still have not bought any!
How I did it: First one day at the time. Just not buying. Remember that you can still ask for candy, and eat if offered, just not buy.
It got easier soon, and the last handful of months were really easy.
Lessons & tips: Do count the days you've done fine with, at first.
Do not give up if you fail sometimes (though I did not, I'm very happy with that).
And, while the time period ended 6 days ago, I still have not bought any!