Tangling Caused by Improper Threading. A massive nest of tangled thread is usually because the sewing machine is improperly threaded. Just because the tangled mess is on the bobbin side of the stitching, don’t assume the fault lies with the bobbin.
You might want to start with a site like this for bobbin threading problems. If you still have the issue , I’d contact the manufacturer for support. We are geared more to computer issues