Sub Connects to Beam but no bass sound and app button wrong way round

Hi Community

First post so hi to everyone.

I am having issues with my sub connecting to my Beam

The sub connects to the beam but no difference in the sound and no bass increase.

In the app if I switch the sub audio radio button off the sound is better and bassier,.

Occasionally it works but that is random and either have to reboot router or call into support, but soon dropa out again.

Reading the latest reviews tells all, the app is failing massively and with each update it gets worse.

Anyone else seen this or have any fix ideas?

Thanks

Mark