Being double changed i could say

What happen to me on the 24th of January i paid my account wth a card and the first transaction declin on their Eft machine, bt it deducted on my account they asked me to retry again then and it approved. Then they told me to claim my money to the bank the bank says its not their folt they must resolve the issue. Today its the 3rd and i went there again to Identity n the worse part now they say they caint see the 1st transaction money that declin it doenst show in their system so my consent where is my money bcz i want it back. It happen at Garden route mall, George