said by squircle:
Well you could contact the police if you have the seller's information, of course. Otherwise, you can use it with Shaw, Rogers... possibly Verizon too (although I don't know if they still use Motorola STBs). Cogeco will never "help [you] at all with this" since it was stolen.
You didn't steal it, but of course you feel like a criminal; you could (technically) be a criminal* for possessing stolen goods. Of course, you were the victim of fraud, and nothing you did had malicious intent, but it couldn't hurt to make a call to the police IMO.
Sorry to break bad news.
Shaw and Verizon do not accept STBs from other MSOs. Rogers also uses a Cisco/Scientific Atlanta equipment in the Ontario region, and they also do not activate outside STBs.
You can ask cogeco if they can give you a small bill credit or some other little freebie in exchange for returning the rental unit to them. But keep in mind if you do this, you're actually helping the person who scammed you as their unreturned equipment charges will be reversed making that $125 you paid them, pure profit.