Advice:
Make sure you check the amount sent to your account before releasing the coin. But not only that, make sure it is the right amount because the scammers are sending an amount similar to (but lesser than) the amount that you are expecting to receive.
This scam is common and many of us are neglecting it and it is becoming rampant everyday.
This advice of checking the amount been sent for you before you release your coin is very important so that if the money is not complete you can chat the vendor for your balance and give negative anonymous reviews; but if you do mistake and release the coin before noticing the incomplete amount of money because even if you chat the scammer, they will not reply you.
The best thing to do now is to always verify the exact amount been sent to you before releasing your coin, you can as well send the money to another account to be sure of the money you received before releasing the coin.
When i had similar experience the guy informed me on time that he will be sending 59 thousand naira instead of 61,000 naira that it was all he had in the device he was holding at that moment. He claimed he was in church. My brother me i no gree o before i go type finish give am, the guy done rush send the money. This guy beg me for over 15 minute, even snub my chat. E no waste time i just report the guy asap na with the screenshot of the half money way him send me. Na so him take release am.
Wating they make me ves pass for here na when i imagine say if them do these thing to like 20 person in a day they fit done collect free 50k from people with the small small money way dem they beg make you leave for them.