Duplicate deducations

On the 25/05/20, i made mulitple online purchases and inorder for the order to go through, you obviously need funds in your account, so my account was deducted. On the 28/05/20 my account was debited again by the same company, for ththe same amount, r290, r500 and r300. I visited the bank was told it was a duplicate payments and lucky enough the payments was returned back to me later that day, on the 29/05/20. R2500+ was deducated from my account, because of the same reason, duplicate deducations. Capitec have no online security, you guys have so many clients but still make so big mistakes. My account balance is now 0.00, how must i survive when you guys IT department is useless? . Wonder how many clients this is happening too but not recognizing it...