Nupay debited my account

Hoping I will also get clarity because the more information im receiving the more confused I become, on the 30th the were 2 debit orders on my account which I was not aware about, went to the branch I was advised it was an authorised debit order still I was not aware doing such so capitec provided me with a number to contact which was Nupay and I did just that and nupay provided me with Legal Cover which I got a shock of my life with the mandate sent to me, the person who signed the mandate its not me and whats shocking is that according to Legal Cover the transaction was performed in khayelitsha mall what is more suprising is the fact that the time on the slip/mandate is the exact time I was withdrawing money in GUGULETHU Square, and according to Legal cover in order for them to debit my card must be swiped on the device (which that happened in khayelitsha) and the strange thing is that the time reflecting on there is 1 min when I withdraw money on capitec atm in gugulethu square on the 4th....im afraid is the a way capitec bank can explain this coz my worry is that what if it was a huge amount atleast it was R270 and I can let it go what if it happens again and its more... im don't feel my money is safe at capitec anymore assist please