On how many W810i did you read all codes? How many of them did you unlock by using the NCK unlock code?
Like I said, there are known cases of people who successfully unlock their W810i using Cruiser & v8.4 free, however, many of them have transformed their phones into 300$ bricks!
I'm not advertising any GSM service in particular, I'm not saying "go to X or Y service" all I'm saying is, if you are not shure what you are doing, don't do it at all! Messing around with cracked software can be a little tricky sometimes!
Go to "any" GSM service that has profesionaly unlocking tools (such as Cruiser box, or at least USB-Smart dongle) and get it fixed cheap & wise & safe! They also guarantee the job!