Sorry to hear about your troublesome experience.
Currently it is not possible to alter orders or invoices, hence the need to cancel and re-order.
While I understand your frustration, could you please refrain from using swear-words?
I understand you have not yet received either a refund or voucher?
Did you get confirmation for the order cancellation?
If not please contact
service@shapeways.com again and they will make sure everything is taken care of.
Or PM me with all order details and I will see what I can do for you.
Unlike your experience, the service is usually outstanding!
But Customer Service is not available during weekends.
So this might explain the delay.
Again, sorry for your trouble.
Cheers,
Stijn