We are sorry to hear about this fitting issue with your motor wheel. Our standard motor hubs are made for 10mm drop outs. Could you please double check for us if your fork is compatible with a 9mm axle width instead?
Make sure to send us a photo of the motor wheel axle not fitting into the fork drop out as well as the make/model of your front fork. If that's not a problem, a photo of your overall bike fork would also be very helpful.
Please contact our support at: support@swytchbike.com