Unauthorised acitvity!

This morning my wallet was emptied out while I slept by an unknown user. I’ve never shared my private key or seeds with anyone, ever! Never visited a phishing site!
I’ve emailed MM for support in tracking down my coins but no response.
How are you going to return my funds!!! you can’t have faulty security and say that you are not responsible for people’s money. that’s a fraud!