Gift Card duplicated and no answers

I received a Truworths gift voucher of R500.00 for my birthday which was on the 12th August 2015 and went to Truworths on 4th of September 2015, to go and spend my voucher for the first time, I went to the counter to purchase my chosen goods and to be told that my voucher has already been used? I have not used my voucher prior to this and I was told which stores it was used in and I have not been to those stores as they are no in my area.<br> I stood inside the Lakeside Mall Truworths, and the Fragrance department Manager assisted me with calling the call centre, which to this day I have spoken to about 5 call centre agents and they all tell me that they would contact me within 48 hours and no one ever contacts me to give me an update on the investigation on my gift card that has been duplicated and still to this day I have not been contacted by any person regarding my voucher, I have been back and forth to truworths for assistance and still get no where. I am actually disgusted in the customer service concerning truworths, im tired of always having to ask them what is going with my refund on my vhoucher and getting no responses.<br> it has now been 2& 1/2 weeks and have had no answers