Well, it's a subscription service, so that's what you're signing up for.
Their website says:
"Our services primarily operate on a subscription basis. Prescriptions for medication are typically issued for specified periods based on your chosen subscription plan, though exceptions may apply depending on individual assessment during your weight loss journey. It's crucial to regularly complete wellbeing questionnaires and maintain ongoing communication with Dr. Frank's to ensure we can provide continuous support and ensure the medication you receive remains appropriate for your needs.
Normally, medication is dispatched every 28 days, unless you've arranged with our team for a custom delivery frequency, such as for extended travel periods requiring more than one month's supply.
Our subscription service includes ongoing clinical support for addressing side effects, assessing medication effectiveness, or addressing any health-related queries you may have.
Managing your subscription is convenient through your Dr. Frank's account. You can adjust delivery dates, pause medication supply temporarily or indefinitely as needed."
I guess you should go onto your account and check your subscription status, and if contact them if you have any questions about it.