Delete duplicate store in mail chimp – Shopify

I contacted mailchimp support because I have an issue with ‘best sellers’ pulling through sold out items – they told me its due to a duplicate store but theyre unable to delete it and have offered the advice below.

Issue of duplicate stores in your account. The work around for the
issue would be to use the API playground or a REST client to delete
the duplicate store in the account. Before doing this, we want to
stress that this deletion can not be undone and could potentially
affect the sending of ecommerce automations/emails that you have in
the account. That being said, I am aware that your account was running
into issues with accessing the playground earlier. If you would like
to delete the duplicate store from the account, we’d recommend using
the DELETE call for the duplicate store through a REST client and
would recommend doing this with the assistance of a developer if
needed. The endpoint that you’ll want to use to delete that store from
the account is as follows:
http://developer.mailchimp.com/documentation/mailchimp/reference/ecommerce/stores/#delete-delete_ecommerce_stores_store_id

If you would like to use the work around of deleting the store from
the account using the API, we’d recommend recreating the ecommerce
automations in your account to make sure that they are using the most
current and only instance of the store connected to MailChimp. While
the issue of having duplicate stores is unfortunate enough, I do see
how not being able to access the playground and having to use a REST
client/outside application only complicates the resolution to this
issue.

From the answers they provided me with I can’t figure out how to do it, I appreciate your help.