I have sent literally tons of audio gear across the border and have never encountered any problem at all whatsoever. Generally speaking border issues most often arise only if the proper paperwork has not been prepared and presented.
I go agree that cross border shipping is more time consuming than domestic however any informed shipper/receiver can seamlessly ship back and forth if things are done correctly.
I feel badly for the OP; however to be in that situation as the OP is would have required things to go very wrong at every level. To an extent one would think that any Canadian manufacturer would offer shipping advice and instructions to assist US customers with warranty returns and it is odd that did not occur here.
I go agree that cross border shipping is more time consuming than domestic however any informed shipper/receiver can seamlessly ship back and forth if things are done correctly.
I feel badly for the OP; however to be in that situation as the OP is would have required things to go very wrong at every level. To an extent one would think that any Canadian manufacturer would offer shipping advice and instructions to assist US customers with warranty returns and it is odd that did not occur here.