[ochjadd]

A couple of weeks ago I claimed DNA on a 1200$ order. The driver showed up my house to ask some questions about the delivery, the problem is that a family member opened the door and he told the driver that he doesn't know of any package not being delivered.
I contacted the company again and they said that they contacted the delivery company to open an investigation.
A day later I get another email from the customer service stating the following:

"FedEx wrote me back saying Courier went back and recipient confirmed they have the package."

What would be the best move to still get the refund?
(The delivery was fake signed btw)