After 18 months, your $60, and black-hole customer service, I'd just blow it off and buy a new watch (for less) and go with that. Sometimes the frustration and stress just isn't worth it.
Although it may not help you any, I bought a watch at Wal*Mart about 15+ years ago for $9.95 (probably about $20 in today's money), have replaced the battery just twice, it's waterproof to 100 feet in depth, shell and band made in China, movement made in Japan. It's literally the most reliable watch I've ever owned and keeps perfect time. And the face is readable without my glasses (that's nearly the most important part).