I would say that if they don't resolve & fix this for you through the process you are working on - by phone - I would quote this law to them to see if they will formally notify the CRA of the error, and then if you have to, officially dispute it with them by this method - and yes, I would use this law in the dispute letter.
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Recent Cards:
12/2012 - Discover (ICL 3,375 CLI to 5,375 05/2014)
12/2013 - Chase Freedom (ICL 3,500 ACLI to 4,500 07/2014)
03/2012 - Gander Mountain MC (WFNNB) 7,000 CL
04/2012 - Ace Rewards Visa (US Bank) 12,000 CL
Back to gardening for a year or two