{¶ 16} Mellon directs us to the plain text Civ.R. 12(G) and (H) in arguing that we should find that O'Brien waived his ability to contest service. He also directs us to this court's holding in Leotta v. Great Lakes Pain Mgt. Ctr., 2020-Ohio-4995, 161 N.E.3d 91 (8th Dist.). {¶ 17} The Ohio Supreme Court has already interpreted Civ.R. 12(G) and (H) in this context and unequivocally held that while there are some instances where a party may submit to a court's jurisdiction and waive the defense of insufficiency of service of process, "[t]he only way in which a party can voluntarily submit to a court's jurisdiction is by failing to raise the defense of insufficiency of service of process in a responsive pleading or by filing certain motions before any pleading."