Hi there and thank you for your question,
I will try to assist you with your legal question but please feel free to ask as many follow up questions as you like until you are 100% satisfied.
Look, there are two ways that things like this can be dealt in: (i) the company fires you and lays criminal charges against you for fraud, and most probably kisses goodbye to the money, or (ii) the company confronts you and asks you to sign an acknowledgment of debt in terms whereof you agree to repay the money.
Often it's one approach or the other.
I can't see that the company will report this to the police for fraud, UNLESS you stop making the repayments. So my legal advice to you is "continue making those repayments".
But there is always the chance that the company may report it to the police... you never know!
If my answer hasn't answered all of your questions, please send me a REPLY with follow up questions so that I can continue to assist you in this same thread for as long as you need. Let me know if you need more advice - dont just rate my answer as "bad".
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Good luck and best regards,