Thanks for reaching out about this, @CarlosT_1 .
Bill shock can cause quite an issue, regardless of the amount, once a bill has been received that is unexpected, it can cause additional stress to the person who is the recipient.
Do you recall choosing a paid plan once you had the trial active? As a credit card is not required for the trial period, normally once the 14-day ends, the store would subsequently close until a plan is selected.
However, can you confirm that your store is fully closed? Once this has been done, I may be able to take a look and see if I can assist with any refunds.
Refunds are dependant on a number of factors and only cover Shopify subscription charges. Domain charges would not be refunded as these are considered one-off payments that last one calendar year. Additionally, third-party app charges would also need to be approved by the app developers.
Let me know how you get on!
All the best,
Hank