Originally Posted by Yaatri

PVD, try and understand what I am saying. The complete document is the CoC. Since the language used on the website was vague, and now has been changed, the credit card issuer or a court will rely on the one pertinent document, which is the CoC. A court overly sympathetic to consumers might rule against the airline, but the OP has no case. Many websites state explicitly to the effect that errors or ommissions on thr website do not override the CoC.
Airlines often do accommodate passengers when they claim they were misled by an employee or their website.
Websites can have errors. The OP will have a difficult time proving that the language, that has since been removed, meant without a doubt that LH baggage allowance would be honoured.
The OP furnished no proof at the counter, as was requiredstated in what you call the policy.
See, we can discuss the issue without bringing interlining into it.