Strange item on till slip and still No feedback from Woolworths

I am a regular Woolworths customer and popped into the Colsseum branch yesterday to buy a couple of things. On checking my till slip as I was leaving, I noticed an item to the value of 136,99 on my slip that I had not bought. I returned to the store and was casually informed that it was a "glitch" in the system and would be refunded. The man, who's name I cant remember went on to say that 'it happens', and there is not much they can do about it. I asked for a manger and was told that the manager was not available and I could speak to anyone on the floor. I happened to noticed a man a few feet away who looked very much like he ran the store, and to my surprise it turned out he was the manager Craig. Craig assured me he would investigate as I wanted to know how Woolworths can allow this kind of thing. Later in the day I returned a missed call from the store and was referred to Jeremy. Craig didn't seem to want to discuss the situation with me. Jeremy explained that the 'item' is not sold in their store and unfortunately its "the glitch" and they have logged a complaint at head office. I asked for the reference number and was informed he didn't have it. I asked Jeremy to find out and let me know and have still not heard a thing from him 24 hours later. I would like to know what the 'item' is and how much extra Woolworths is making with this "GLITCH"? I logged a Facebook post and have still not heard back from the store or Woolworths.