I have had nothing but a frustrating and disgusting experience with Citi NRI.
Sent a letter to Chennai office, 2 times so far without resolution yet, per instructions from customer service, instead of resolving a small online account lock issue on a call / text / email within the U.S. itself.
The first time I sent this, the bank kept waiting for a signature, and never followed up with me on the next steps and they expected a signature on a letter written by me, along with a driver's licence copy that already had my sig on it. I got to know the need of a signature after 2 months, and after 10 calls that I had to make from on my own. On top of that, one of the calls where the issue was escalated to a Manager, Rams Manager, Mgr SriRam hung up on me because he probably was in no mood to listen to a complaint.