[Nutany]

metods not working

It's not that they don't work, but rather you failed to pursue the SE. A police report Is simply part of their protocol to move forward with the claim. File the report, allow their administration to put pen to paper and get your replacement/refund thereafter.

Is it possible to prepare a false police report?

That's illegal as shit, the police report is a standard procedure, just file it. No risks involved.