Finally, after a bunch lot more emails. I guess the lawyers letter helped.
Thank you for your business. We enjoyed having you as a member. While we are sorry to lose you, we do hope you will consider us again should your business require lead generation in the future.
I also got a personal email from my customer service manager, but it was full of it, and I don't want to raise my blood pressure looking at it and rebutting it on a paragraph by paragraph basis. Most of it stems from the 'value' of their service and how it was presented by their sales staff.
7 months ago