Wire Transfer Problem — ACH payment reversed after goods shipped

I've been trying to resolve this on my own but I'm stuck.

ACH payment reversed after goods shipped. I've been dealing with this for about 13 months now and the situation isn't improving.

The amount being held/disputed is approximately $17,913. I have tried contacting customer support 10 times with no resolution.

Should I hire a lawyer for this or try to handle it myself?

Been there. Here's what I learned.

I ended up escalating to a supervisor/manager, which cost about $1-3 but saved me a lot more in the long run smh.