Harvest Frenzy Subscription

I received an sms on 17 Nov 2015 stating that I'm subscribed to Harvest Frenzy. I immediately contacted MTN as I did not subscribe to anything. They told me to use *141*5# to see if it actually exists and to unsubscribe. I did that and it was stated that I'm not subscribed to anything. I've contacted MTN again with this information and was told that perhaps I received the sms in error and to not worry about it. Today 4 January 2016 I realised that charges occurred on my bill.<br> I've contacted MTN via their website chat services and they confirmed it was from AIRG but I need to sort it out myself. I've contacted AIRG and managed to unsubscribe.<br> I didn't subscribe to anything and I was charged for something which I didn't subscribe to. Is MTN now just going to walk away and I loose money?