How do I open a case to get an issue resolved with Amazon?

Hi,
I have just answered this on your other thread.

Hi Sarah…
You are still on the Amazon forum, sorry you are finding it so hard to contact seller support.
Try this link in blue, click “your account” > “other account issues” explain your problem and enter your email and phone number.
Seller Support will then call or email a response to you.

https://sellercentral.amazon.co.uk/cu/contact-us?categoryId=30002&typeId=30005