Union Bank Of India — unable to perform upi transaction via google pay via linked ubi bank account

Address:

Mumbai City, Maharashtra

From last 4-5 days i am trying to perform money transfer via google pay but transaction is not getting processed (Always stuck at payment processing by partner bank;bank server didn't respond:error code-91). Worst part is that whenever i tried to raise grievance on ubi website java error is reflecting from last 1 week... Refer latest screen shot in attachment. (Previous to that webpage was not getting open) also as per closure comment of earlier grievance whenever i tried to call there mb team's number they always tells that there is issue in upi/server/switch and will resolved shortly but as of now issue still not resolved.

Last grievance number[protected]