Sovereign
A chief ruler with supreme power; a king or other ruler with limited power.
Citizen
In general, A member of a free city or jural society, (civitas.) possessing all the rights and privileges which can be enjoyed by any person under its constitution and government, and subject to the corresponding duties.
The only sovereign in this universe could be our Creator.
Anyone who refers to another as a “sovereign citizen” is an uneducated puppet. There can be no such thing. The “sovereign citizen” is purely a propaganda tool to try and label anyone who questions the legitimacy of those who call themselves “government”.
If you have evidence you have been labelled a “sovereign citizen” you might consider suing the offenders for defamation, especially if they have shared their opinion about your character with other agencies.