Changing from 4G to 5G in prepaid

Is this a monthly subscription or a prepaid subscription?

It’s prepaid subscription

Only option is to contact Elisa's customer support directly. Only their support team has the backend access required to cancel a queued prepaid package.

​If you explain the mistake, they can manually cancel the pending 4G package and refund the payment back to your prepaid balance. Once the money is credited to your main prepaid balance, you can go ahead and buy the 5G package instead.

What to have ready:

Before you call or start a chat, make sure you have your prepaid phone number, the PUK code of your SIM card (found on the original plastic frame your SIM came in), and the payment receipt or reference number from your bank transfer. This will allow the support agent to verify your account and process the change immediately.

Thanks for the replies! But I couldn't get through to tech support—the chat is slow, doesn't provide operator contact information, and when I call, the phone automatically switches to Finnish and Swedish, which I don't speak.
I need to speak to an operator in writing.

Quick check, did you possibly enter the wrong phone number when ordering? The operator usually does not refund incorrect prepaid top-ups. This would be a shame in your situation.

I apologize for my incorrect advice—wrong company. This would be a simple matter to handle, but unfortunately, Elisa has chosen not to help the customers with this kind of problems.