Your post is too vague to understand where the problem is at this point in the porting process. It's possible that your attempt to circumvent the restriction on porting in land lines (VoIP numbers are land lines) caused a problem with your number's routing. It's also possible that the port is still in some sort of incomplete status.
If you want to troubleshoot this, it's best to eliminate the OBi from the path, and then find where the calls are failing -- either when attempting to connect to your ported-in GV number, or to one of your forwarding destinations. Remove the check mark next to the Google Chat destination in your GV account settings. Temporarily set GV to "do not disturb" mode, here:
https://www.google.com/voice#callsettingsNow, you need to call, or have other people call, your ported-in GV number, and write down what happens. Do the callers get forwarded to your GV number's voice mail greeting, such that they can leave a message? If so, and you see their calls listed in your GV history tab, here:
https://www.google.com/voice#history then your number is working properly. You need to test this from multiple carriers (land line and mobile).
If you don't see the inbound calls in History, then you need to clearly post your problem on the Google Voice help forum. Include the last 4 digits of your GV number, the date, time and timezone of at least 3-5 failing calls, and the last 4 digits and telephone carrier of the calling party.
You've referred twice to the Google "support people". There is no direct customer support for Google Voice. If you post your issue in the Google Voice help forum, one of the Top Contributors (with the green badge) will probably see it and help you, but you need to post a clear, detailed question with samples of failed calls. The TCs can refer your issue to Google engineering if appropriate.