Product: Money transfer, virtual currency, or money service

We posted item [ s ] for sale on XXXX marketplace and other websites. Someone interested in buying the same. We have told that it costs {$120.00} and transfer the same to our account. I have shared email id of my bank account. I have told that item will be shipped after receiving the amount. they have called nextday and told that by mistake t they transferred XXXX instead of XXXX. on XX/XX/XXXX I have checked my bank account and i can see amount for {$1200.00}. i have decided to send money back and took his email id. i have transferred the money of {$1100.00} ( using XXXX through Bank of America ). They told that it went to their old/closed account and they said that have called XXXX and sent money back to my account. I have checked my bank account and i saw credit of {$1100.00}. He asked me to transfer to his other email id since first transfer didnt work. I did the same. Second time he told money didnt go through since his account locked due to low balance. He told that he called XXXX and cancel the same. I saw second credit of {$1100.00}. He asked me to transfer {$1100.00} this time to his sister account. I tried to transfer the same from Bank of America and failed sine max limit per day exceeded. I have used my XXXX to transfer the amount. Next day - on XX/XX/XXXX he told that he is able to unlock account and as part of initial transfer he accidentally transferred twice and that got processed after unlock I have checked my bank account and can see credit of {$1200.00}. I have decided to send it back so sent to his email id. He again told that somehow money went to his old/closed account and his account is locked again. He told that he called XXXX and cancelled the same and he requested me to transfer the excess amount so that he can unlock his account. This time i have transferred {$1200.00} to his another sister account from my chase account and waiting for credit from XXXX. After sometime he told that he is able to unlock and issue resolved. He told that money will come by EOD. 

From this point he is not reachable. Not able to call/text. Next day surprisingly all the credits were not appearing and when i checked with Bank, they said they dont see of those credits and they told someone called 2 days back and ( on the day of my first transfer ) submitted Claims ( pretending that they are unable to deposit amount in ATM ) using my personal details and questions. Bank also confirmed that there are total 3 claims created ( XXXX,XXXX,XXXX amounts ), due to this Bank issued those credits. Bank also told that he might have cancelled his transfer and thats why credit got reversed. I have told bank that i didnt create those, Bank of America cancelled all those claims and debited the amount from my account. I have explained the situation to the bank ( Bank of America ) and they created new claim and investigated and told that i am responsible for these transactions. Bank should have checked/investigated all the activity happened before and during transfers initiated by me. Since there is fraud ( since someone created claim by providing my personal details ) involved here, all my transfers should be disputed/cancelled. 

Since Bank of America applied those credits, i have transferred money to other person. 
First thing Bank of America should not have issued those credits ( as part of claim ) without my involvement. First 3 claims created by other person are not authorized by me. Due to this unauthorized credits i have transferred 3 times.