MOMO RECEIVING FROM FRAUDSTERS

I received Ghc402.00 from unknown sender this morning. Initially I was thinking it was from someone who borrowed money from me but not,then I saw two numbers that have been calling me several times. I have some settings on my phone that if I haven't save your contact, you can't me but u will get notifications that you're calling me. The number was familiar and I called back.I realise from her voice that she's fraudster and not real, the issue the money is received real but it's not safe.They push the money from someone account to yours and they will demand you to send it back to them on different account Becareful and don't be greedy, she insisted to take some of the money and send the rest to her and and that Ghc100.00 out of the Ghc402.00. Saying her mother is the at hospital and they need the money for something. What I did, I asked her to call MTN for refund and she wasn't agreeing with me that it's long process to that.The conversation was taken too long and I hung up the call. She texted me because her calls were not taken, saying in the text message that, they have called MTN and MTN insisted that I should send the money to them because the reversal is going to take 51 days. The funny part is ,I didn't receive any text or call from MTN and this is totally unacceptable and fraud. I just thought of you and I shared with you to be safe from any police case or accuse of such acts