SenseCAP M2 4G using way more data than it should

Hi,
I have a similar data usage profile. I have my gateways configured with local network mode with and 2 lorawan devices. The gateway is always connected with the sensecap portal and transmit recurrent data to it. To match my m2m data contract, I need to disable some features to reduce the data usage. How can I do it ?

Regards,
Ben