I've repeatedly experienced them showing a lower price and then increasing it on the payment page. Recently I was offered a free prime membership and accepted it to give the service a try. Same issue - offers "prime discounts" until the payment page. I finally called in to ask about this and was told that despite sharing screenshots of my prime account, confirmation emails, login showing I'm a prime member, they still tell me I'm not a member. I was transferred 4 times for that. Junk from the start...
Location: US
Dear M A,
We are very sorry that your customer service experience was not positive.
The way the interaction was handled did not match our quality standards, which are very important to us.
We have rechecked the case to verify that the quality standards have been respected in all other situations: we confirm that the request is ongoing and is being handled correctly.
As soon as we have a response, we will send you an email to the address you used to make your purchase.
We thank you for your patience and understanding.
Regards,
John
Customer Care Team