OK from my personal experience this is what could happen with you. Since the Consulate already emailed you back saying visa officer at the POE will correct it.. I really don not think that emailing or contacting the embassy would do any better.
When you land.
1. Either the IO at POE will give you a form " Entry for further examination or admissibility hearing" IO will make you sign the document and wont process your landing till the IO get the mistake rectified by the visa office, but don't worry if you are genuine and your case is valid than you'll be ok. After the IO get confirmation from the visa office that the error was made from their side. You will be call again to the airport to complete your landing.
2. It is also possible that the IO at the airport or POE will just change the information in the system without going thru the process but i highly doubt that.
3. Since you have an error on your COPR once you complete your landing, CIC will ask you to send your document to their query department in Ottawa for correction, currently the wait time for applications are 2 months. They will correct your COPR stamp it and will change their records.
But in any case dont worry do take the email reply you received from the visa office as a proof.
You will be fine. Goodluck with everything.