Money taken without consent

Syntech had money being deducted from my husband's account between July 2019 untill April 2020. According to them it will not possible to get bank statements for that period. I lnow for sure that they will be able to. R9700 in total is definetly not small change. My husband didn't sign any debit order, nor did he give permission to have money deducted from his account. We want Syntech to refund us the money that was taken from my husband's account. I am awaiting for a reply from Syntech with a satisfactory answer