This bitgowallet.org is a fake wallet. Someone in telegram user sent me something like that too. It will let you download a file like 500mb size.
This is what he sent. You can have it too if it's a legitimate wallet. I suspect it's pishing because no one will give something for free this days.

How did you know that you've been hacked?
Check the link history if how you access the Bitgo wallet or if it is an app you can post the link here if how you download the app.

Why not take a screenshot of your Bitgo wallet and post it here?

---

Are you using this app below?
I'm sorry I don't like to link it here just copy and paste this to your browser.

They only have 100+ install which I think suspicious.
I tried to find this app on bitgo.com but I can't find a link that will lead to this Bitgo wallet.

So, I believe that this wallet might be a phishing app.

I thought you were referring to Bitgo.com...

Bitgowallet is using Bitcoin.org template (clearly made for phishing). I suspect you downloaded a malware and your funds has been sent to the wallet creator.

Seems like it’s fake BitGo wallet

You can put it in the category of the impossible, and consider it a path of no return. If it's a bigger amount of money, and you can prove that BitGo is responsible for some security failure, then you could take some legal steps, and submit the action for damages.

This is stated in BitGo Terms :

How many coins you lost? I think I can help you

You mean Bitgo.com? Not sure how could someone get access to your private keys when the wallet doesn't let you export them but if someone withdrew the funds from your account, then all you can do is reach out to the support, they might be able to give you the IP address... but I doubt that would be of too much help...