Refusing to pay back refund

Reference Number [***] Worst company ever, after they opened a ********** policy under my name they claim that they are going to refund me back my money, but now instead of refunding me from July 2021 when they first started deducting my money from my payslip, Sibuyiselo Mqwati Complaints Resolution Specialist Operational Control *** sends me an email stating that according to them the policy started in August and mind you this is after I sent through all my payslips as proof of deduction the July payslip is the reflecting the R447.77 premium that went off, now they robbing me my money that they stole in first place ***