Hi- Welcome, what seems to be the problem? Describe your machine and its issues, photographs of the motor, controller, display and any error codes and any labels there on too would also be of help. Could be a simple fix or generic part exchange??
If a diagnosis/fix is outside your comfort level and you cant be talked round.. at the bare minimum the group should be able to arm you with the questions to ask and red/green flag responses to expect dealing with local workshops if direct signposting you to an engineer fails to come through.