Assuming you purchased the iPhone in either the EU or Romania from an Authorised source ,then you choices are as follows......
Use your Carrier for an Out of warranty exchange ,your only choice in Romania
There are two service options for iPhones that are not eligible for warranty service:
- If your iPhone requires service due to the battery’s diminished ability to hold an electrical charge and it is not covered under Apple's warranty or statutory consumer rights, please contact your carrier.
- Please contact your carrier for Out-of-Warranty Service Options.
Take to an Apple retail Store genius bar in any other EU country where Apple have Retail stores for an out of warranty exchange
the price in Euros is 249
Carriers can set their own price if that is your only option