As I understand it, you were not compelled to sign the contract, so did so of your own free will, and likewise took an action, namely leaving the country, of your own free will that directly lead to you being in breach of contract by breaching your contract with your bank.
None if that is the fault if the party you had a contract with, so you'll likely be considered at fault. It is up to you to remedy the situation, deal with any penalties you've incurred and return to compliance with the contract.
I don't know which country you are in, but you may have luck with an international bank that has branches in your current country and your original one.