I have raised the complaint about banking, till now no one replied . Very worst service. What can i do....

Hi there, nurpuhandlooms.

Welcome to the QuickBooks Community. This isn't the set of impressions that I'd want you to have and we know how much time it can take when something isn’t working the way you need it. This is why we make great efforts to deliver customer satisfaction at all times and to fix an issue as soon as possible. With this, I'll make sure to share details about how raising an issue with any QuickBooks concern works. Before that, may I ask what specific banking problem did you encountered so I can check the updates on this. 

Once you raised an issue in QuickBooks, we aren't able to give a specific timeframe when the issue will be resolved. Once you've communicated with our QuickBooks Support Team to add you to the list of affected users, rest assured you'll receive updates through email. You can also send or reply to them using the existing email to check for the status of the banking issue.

Please refer to this article to see different banking errors when uploading bank and credit card transactions into QuickBooks Online and how to fix them: Fix bank upload errors in QuickBooks Online.

In case you have other queries or concerns about banking transactions, tag me in your reply and I’ll be around to back you up. Have a good one and keep safe.