Standard bank *****

My mom went to withdraw money at a standard bank ATM on the 21st of December the ATM was at the branch, she inserted her card inside the ATM,put the pin as per usual. Her card never came out of the ATM and an amount of R4850 was withdrawn from her card. Standard bank is saying they are not liable for the ********** act that took place and they are not going to pay my mom back the money that was ****** from the ATM. Can you please assist me in this matter. They definitely deserve a bad review. The call centre is a joke. The call center agent first investigated an incorrect case, then one agent **** saying my mom was with someone which was nit true. Which makes me think they are still investigating a wrong case.