Sorry to hear you don't have access to your Family Mix. Have you tried the steps outlined under Join or leave Family Mix on this support page?
It's also good to double-check that you're logged in to the right account. Check to see if you have any other accounts.
If the above tactics don't work, we recommend you add your + VOTE to this ongoing issueand make sure to leave all the relevant information requested under the Status Update, so that the right folks can get to the bottom of this.
Hope this helps. Let us know how you get on.
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"Where words fail, music speaks." - Hans Christian Andersen