Thank you for the question. I am very sorry to hear about this matter. The court have the power to change the birth certificate and also have the power to make the person surrender the one they have. You will require to raise and action in the court and provide them with a DNA sample, however the court may order fresh testing to be done. You must make it clear to the court that there was no intention of false paternity as this itself is a criminal offence, however your legal representative will ensure this is taken care of. Once the court are satisfied of paternity, they can order the change of birth certificate to reflect the actual paternal situation. If required you can also look at non-molestation order and/or occupation order against the ex boyfriend.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
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