Many thanks for your patience, I am pleased to be able to continue assisting with your query now. First of all, I am sorry to hear about the issues you have experienced in your situation.
The usual way to request the removal of such information is under the ‘right of erasure’ under Article 17 of the GDPR. I can see already that you have submitted such a request but doing so does not guarantee the desired outcome will be achieved and all it means is that you are asking them to do this, rather than making it mandatory for them to do so.
If they ignore your request and are unwilling to remove the article in question, then the only way is by making an application to court for an order for them to do so. They will then have to comply as the matter is no longer just in their hands and they have an official court request to deal with it.
Due to the technical nature of such requests, you are best advised to engage a solicitor to submit the application on your behalf to ensure it is done properly and nothing is missed. As we are just an online chat service, we cannot do that for you unfortunately but there should be plenty of lawyers who can, if you search around.
You should be looking at data protection lawyers preferably as they would be best placed to deal with this.