If your proposed/intended travel date is sometime in the future they may have put your application on the back burner, while concentrating on more urgent applications.
I'll give you the short ugly truth. Even if you were to get in on a DTV stamp this time, you'd have to do this every 6 months for the next 5 years. The approved passport that the issued visa is tied to is missing, typically you would have had to carry both passports for 5 years.
Ultimately you're going to have to apply for a new DTV.
you were given a 6 month multiple entry tourist visa if you time your last entry carefully and use an extension in country you can get almost 9 months out of it
Anonymous participant Relax, you have options including checking your status the minute you walk up to immigration in Bangkok, failing that get a visa exempt entry stamp on arrival and wait a bit longer.
Contact them and briefly tell the circumstances, you got approved then bought a ticket for day X, then we're called in for an interview, and you only have X days before your flight.
Ideally you'd have color photos of every page of the missing passport, not just biodata page. Print out all your various proofs for the IO. Your hurdle is passport control accepting the photos of the old passport as genuine proof. Worst case scenario you get stamped in 60 days visa exempt and try and get a fix in Thailand.