All is Red with Huawei B535-232 Router

Using a Huawei B535-232 on Three 4G. The service has been pretty diabolical - as low as 50kbs up/down in the evening. The service is clearly congested and streaming stops working.

i am having difficulty getting Broadband Quality Monitor to work. I have unchecked the box 'Disable WAN port ping' on the firewall page. Are there other settings that need to be altered to get it to work properly?

Many thanks,

John O