Dear poster, my experience in pos dispute resolution, there is no way a merchant(Mobil station) can stop pos reversals without providing approved receipt for the disputed transaction. Bank gives merchants 24 hrs to respond to the claim( that is, to provide approved scanned copy of the transaction n if otherwise funds will be automatically reversed back to the customer). In your case, I feel your bank only asked if your money settled into the merchant account and the merchant bank said yes. Go back to your bank and tell your bank that you want ur money reverse back to you and that they should mail the other bank requesting for refund.