If offering free support is too expensive, then they shouldn’t offer free support, instead of externalizing the costs by wasting the time of every customer who calls.
Charge callers some small fee and refund it if it was a real issue.
Charge callers some small fee and refund it if it was a real issue.
Instead of being actively hostile towards the naive idiots who gave you money for your junk of a product which you now refuse to even support.