As some hundred other C2 users have not reported this, I suggest to open a ticket at Jolla’s ZENdesk instance to get a replacement device (probably opening a ticket there is also the right way to demand a refund), or to show up at the upcoming Jolla C2 support day in Berlin if you can.
P.S.: I wonder if the Jolla C2 allows for performing a “factory reset” to start the whole software installation anew? If so, you may try that first.