Review charged twice foe 1 meal

on the 21st of April i bought a meal at Chicken iicken OR Tambo airport it was R134.70 time 11.07 , the rude cashier then told me it was declined so i paid cash , the amount the went through my bank account and i showed them the rude manager the told me that it will be reversed but i never got reversed please i want my money back chicken licken and i have a slip to show i paid cash and a bank statement to show the money went out of my account and never got reversed.