Hi there and welcome
Can you tell me the message when it fails to activate please?
yes, but what is the message you get when it fails?
Yes, thats the deposit you made when you created the question as this is a paid serivce. There are no more costs
The issue is your phone is locked, and you need to have the original provider who locked the phone, unlock it.
Where did the phone originally come from?
please contact customer service for a refund