I am not an attorney..but I can make a suggestion..
First off...if the "recorded" conversation was done without the other parties consent and knowledge..not only may it not be admissible it court..but you could end up in trouble yourself. Video may be okay..but audio is very debatable in the eyes of the law. Why?..don't ask me but here is a copy of recording laws for Texas..which I guess this is where it took place...
So long as a wire, oral, or electronic communication—including the
radio portion of any cordless telephone call—is not recorded for a
criminal or tortious purpose, anyone who is a party to the
communication, or who has the consent of a party, can lawfully record
the communication and disclose its contents. Texas Penal Code § 16.02.
Under the statute, consent is not required for the taping of a
non-electronic communication uttered by a person who does not have a
reasonable expectation of privacy in that communication. See definition
of “oral communication,” Texas Code Crim. Pro. Art. 18.20.
A person whose wire, oral, or electronic communication is
intercepted or disclosed has a civil cause of action against the
interceptor or discloser. Texas Civ. Prac. & Rem. Code § 123.002.
Such a person is entitled to recover $10,000 for each occurrence,
actual damages in excess of $10,000, as well as punitive damages and
attorney fees and costs. Texas Civ. Prac. & Rem. Code § 123.004.
In addition, unlawful recording of a conversation or disclosure of
its contents with reason to know of the illegal interception is a
felony punishable by two to 20 years in prison and a fine not to exceed
$10,000. Texas Penal Code § 12.33.
If I was in your shoes I would just file a small claims suit...if what you are stating is true...it should be a slam dunk and you will recover funds...my bet is the bank will settle not too soon after the receive the summons.