Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
Dear sister, thank you for trusting. We highly appreciate your question that shows your eagerness to perform `Umrah.
In your case, you can free yourself from ihram, offer a sacrifice, and compensate for this `Umrah later.
In his response to your question, Sheikh Ahmad Kutty, a senior lecturer and an Islamic scholar at the Islamic Institute of Toronto, Ontario, Canada, states,
You are allowed to free yourself from ihram since it is no fault of your own. You should offer a sacrifice, according to the ruling of Imam Abu Hanifah. Your father can do it on your behalf.
According to Imam Malik, sacrifice is not needed in your case, since it was not because of your fault. However, if you are a strict follower of the Hanafi School, you are advised to offer the sacrifice.
You should also perform another `Umrah to compensate for the one you have missed, if you are able to do so.
Allah Almighty knows best.