I've never written a review before but I'm so annoyed I decided to... I used Costco online for same day delivery and was happy to pay a premium service and delivery fee (I even happily tipped the driver). HOWEVER this month I noticed a recurrent credit card charge for "Costco Instacart" on my bill. When I spoke to a Costco customer service rep they basically said "we have no idea and you need to speak with Instacart." I've never used instacart and didn't even know what it was, save for the fact that Costco partners with them for deliveries. Now I have to work with their customer service department to try and solve this recurrent charge. Costco shouldn't be partnering with an organization if they are unable to assist THEIR customers and I think it's shady that this charge came up. I'm pretty savvy to such things aka signing up for VIP memberships etc. and did nothing but place a one time order.