Mum's maid borrowed from loan sharks. Now harasessing my mum.

As the title mentioned, my elderly mum's maid borrowed $500 from a loan shark without telling my mum. And the loan now ballooned to $2000 even after she finished paying the initial amount. Now the loan shark is harasessing my mum's phone number with over 30 spam calls and msgs a day.

We have made a police report but it's not stopping. And today my mum found someone hanged a bag of food outside her gate. And the loanshark sent a photo of the food to the maid telling her they know where she lives.

I am wondering has anyone else faced a situation like this before and any advice.

Thanks