CEO at Instacart here. I want to apologize for the way you, and a small number of other early adopters of Instacart Express, were treated.
It's true that we changed the policy for Instacart Express so that orders under $35 were charged a delivery fee. We also did a poor job of notifying our customers of this. We did send an email, but due to a bug a handful of customers, yourself included, never got the email. That sucks, and we're really sorry.
Please rest assured we will refund you any delivery fees AND any subscription fees that you have had to pay as a result of this.
We are in the process of reaching out to everyone who could have been affected with the next steps.
Again, I'm really sorry we screwed this up and we're going to make it right.
Thanks, Apoorva