Title companies generally remit taxes forthwith.  Otherwise, they may encounter a claim.  You should locate the title policy and contact the underwriter, not the agent who issued.  The Underwriter would be a major title company such as Chicago, Fidelity, First American, Stewart or Old Republic.  If the agent is holding out, then the underwriter will see that the issue is resolved.  I practice in New York and the information herein should be constrained accordingly.