If you want someone at SPG to know what you have to say, write to them directly. I would not count on any review site, regardless who sponsors it (SPG included), to get the attention I think you are hoping for.
From the posts I've seen here, direct contact with the Lurkers or Customer Care usually gets results. Do expect the hotel to be involved so keep the issue succinct and on point without rambling or emotional statements.
Last edited by RogerD408; Oct 27, 2017 at 10:27 am
Reason: Per William's suggestion below