Goldshell mini doge miner (one). it has been hacked three times. help me!

[keenkiss]

My Doge miner was hacked for mining settings.

Goldshell Mini Doge miner updated to firmware 2.2.7.

The mining settings of the Mini Doge Miner were changed, and it is now mining to a different account.

I performed a factory reset and updated the firmware, but it has been hacked three times in the same way.

Is there a way to prevent this?

I need help.