Would I loose the content I have in the cloud when I unsubscribe from apple one premium in order to change the region of my App Store?

Hello EnriqueGallego,

We would like to see howw we can help you with transfering to a different country. You will not lose your data stored in iCloud as you are retaining the same Apple ID account. It looks like you are coming from the perfect link for this issue, just to be sure to follow all of the steps: Change your Apple ID country or region - Apple Support

"What to do before you change your country or region

• Spend any balance remaining on your Apple ID. If you're not sure whether you have a balance, check your Apple Account balance.
• Cancel your subscriptions and wait until the end of the subscription period. 
• Wait for any memberships, pre-orders, movie rentals, or Season Passes to complete, and wait for any pending store credit refunds to process. You can cancel a pre-order.
• Make sure that you have a payment method for your new country or region. See what payment methods you can use.
• Redownload your apps, music, movies, TV shows, and books on any devices that you might use to play or read them in the future. Some types of content might not be available in your new country or region. Learn what types of content and services are available in your new country or region.

Use your iPhone or iPad to change your region

1. Open the Settings app. 
2. Tap your name, then tap Media & Purchases.
3. Tap View Account. You might be asked to sign in.
4. Tap Country/Region.

5.Tap Change Country or Region.

6.Tap your new country or region, then review the Terms & Conditions.

7.Tap Agree in the upper-right corner, then tap Agree again to confirm.

8.Select a payment method and enter your new payment information and billing address, then tap Next. You must enter a valid payment method for your new country or region."

Cheers!