Despite it being a total loss as they aren't paying, the figures you provided indicate an average fee of less than $70.
Please don't work for such a low fee. You're better than that . We're all better than that.
FWIW, I worked with them once in mid-2017 and the fee I accepted thru SnapDocs was $150 and I was paid thru Vendor Pay in less than 30 days. Could that be your problem? You must be signed up for Vendor Pay thru SD for this client.