How can I handle chargeback fraud in my furniture store?

I Don’t understand how this can happen! We are a furniture store. We had 6 purchases made from what we now understand is a sophisticated criminal organization out of Montreal in Côte Saint-Luc QC. It took two chargebacks to realize that we were in trouble. We made sure to call the customer and confirm delivery time, where to drop off the furniture, address was the same as the online purchase order, name on the id was the same as the customer whom made the online purchase, phone number matched the online purchase phone number. We had many conversations with the thief (customer) about the items they purchased. My delivery guy upon delivery had the thief (customer) sign for the delivery, The address and names matched the purchaser order. Why would I not think these were legitimate purchases. Weeks later we start receiving chargebacks. I called the thief asked him why is claiming a chargeback, he said he’s calling the bank, then he’s saying he’s e-transferring us and we are not to worry. So basically this is proof we spoke to people. We submitted the signed delivery invoice, a picture from THE BUILDING SURVEILANCE OF MY DELIVERY GUY DELIVERING THE FURNITURE TO THE LOBBY TO THE CUSTOMER THAT SIGNED FOR THE DELIVERY. Yet here we are we’ve LOST the chargeback. I called Shopify and they are not helping. We had to close our bank account down, this has devastated us financially. Shopify is doing nothing.

We are small establishment. It’s disgusting how we are not protected. Yes I saw that the orders were High Risk, but we were also given guide lines to ensure identify and we did just that. We insured identity, address and received signatures. We are out $36,000.00. I don’t know how we are going to survive this. I employ my family. I don’t know what to do.