I ended up cancelling and vowing to never go back to their service after they didn't credit one of my "come back" coupons correctly. Not that it was the biggest

I ended up cancelling and vowing to never go back to their service after they didn't credit one of my "come back" coupons correctly. Not that it was the biggest deal, but they deliberately were doing something other than what they advertised and were completely unapologetic about it. That small act lost me as a potential customer to their competitors.