I am not sure what you want to do here , lose the adoption order or sue social services?
The child is 16 and has been, and still does live, in a residential therapeutic care home which is an approved local authority home. I have been told by the social worker that I cannot relinquish my parental responsibility but I can "withdraw." They will still be obliged to keep me informed of matters, but I do not have to engage. We have another adopted son (brother) and they have contact once every three weeks. About 12 months ago the LA threatened us with pursuing shared legal responsiblity unless we agreed that our daughter could have contact with her birth mother. Therefore they can take away/share legal responsibility, but I cannot relinquish responsibility. This seems very one sided to me.