Bad customer service

I am writing to express my disappointment, I bought my son a couple of items at Ackermans as I always buy my kid's clothing there and one shirt that was worth R149.95 did not fit him and so we decided to take it back to Ackermans in Alexanda Shopping centre upon arrival they did not have the shirt anymore so I decide it would be best to get a gift card for future use. To my surprise the card was for R89 which I was not informed pria and when I asked them they told me that the item was now a mark down and the system can only give me that much, so what I need to know is where does the rest of my money go and who gets it coz I paid the R149.95 for the item and I expect that much back or on the gift card I chose.

I need all of my money back and not the mark down price because that is not what I paid when I initially bought the shirt.

Please note that I am willing to include my lawyers in this matter regardless of how small the amount may seem to you, it was my money and the gift card should contain the whole amount not what the shirt costs now because that is not what I gave the company.

Also note that I expect an answer within 24 hours or I will escalate the matter.

Awaiting your response.