Beware of being listed on Groupon

I listed some sale products of a well known international brand on Groupon 4 years ago and no longer wish them to come up in google search engines, as this is potentially damaging to the brand's reputation. Groupon are unable to remove my listing from their server so it appears that I am still offering these styles on Groupon 4 years later, with out-of-date messaging, which is causing a fall out with my international brand owner.