UPDATED: June 2017
After receiving the comment below from the company's owner, I have spoken with Sam and have received a copy of the receipt for this transaction. Sam genuinely apologized for the hassle this had caused me and from my view appreciated the position this put me in. I'm obviously still not thrilled with the delay this caused in receiving the appropriate rebates but I do believe that this company is generally a good one and has made a sincere effort to make this right.
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Our furnace stopped working in January and we contacted Cosmopolitan to replace it. Truthfully I really liked Mike's professionalism and he and his team did a great job in repairing everything in short notice. They were also able to alert us to a problem with our A/C (which we also replaced).
However, the MAJOR problem I have had since is in trying to get a receipt for their work. I was not given one on the day of the service (and in hindsight I should have probably noticed this as a problem and insisted on one). I have followed up REPEATEDLY with Mike over the 3+ months since and despite repeated assurances that he will send me a copy, I am still waiting. I've also tried going through the head office but the person I spoke to there was even less helpful. I was told that they likely didn't have a record they could share with me (something I find a bit hard to believe since they must be keeping some records of their outgoing work) but that he'd take a look. That was a few weeks ago and again I have heard nothing since.
In the meantime, by not having a receipt for this replacement, I have been unable to finalize our attempts to receive an energy efficiency rebate for over $1,000. In every other regard my experience was great with this company but I wouldn't recommend them to anybody based on how this has gone. I would STRONGLY urge anybody who is considering using them to INSIST on getting a receipt at the time that the work is completed.