OK ... so your refund that was released was HIGHER then what the third party bank released.
So possible explanations are:
You had an advance loan to repay either with the TT processing bank or another companies processing bank (they collect for each other since there are only 2 companies that do these loans). Or you had another debt that the bank is collecting for ... so you will need to call the processing bank to see what happened to the balance of the refund.
Check SBTPG: by logging into their website at: https://cisc.sbtpg.com/
Or you can get 24-hour automated info by phone at: https://cisc.sbtpg.com/contact.aspx
