Cancel it. Keep proof.
Write the message that cancels a subscription, keep the proof that you did, and if you were charged again, write the message that asks your card provider to dispute it.
Nothing is sent or saved. The messages are written here on your phone or computer. Never put your card number in a message.
What has happened?
Fill in what you know
Leave anything blank that you do not know.
Message to the company
Send it by email or their own form, and keep a copy.
Message to your card provider
Use this if the company charged you again after you cancelled and did not put it right. Card providers set their own time limits for disputes, often counted from the day of the charge, so ask yours how long you have and do not wait.
Keep your proof
What it will not do
It writes messages. It sends nothing and cannot make anyone refund you, and the rules for disputes and refunds differ between countries and card providers. If a company ignores you, ask your card provider or the consumer body where you live what to do next. This is not legal advice.