Try calling your landline from a mobile , does it ‘ring’ , if not dial 17070 and check the appropriate number is announced, if the correct number is announced reset the hub and try calling yourself again.
If it does ‘ring’ when you call yourself initially , the chances are no attempt has been made to contact you , I’d be amazed if they systematically look at your router status , (incorrectly) determine it’s switched off so don’t bother to call and send a text instead , if on the other hand they try and fail to get through ( or don’t try but say they did ) stating the hub must be switched off is a convenient reason for being unable to call you, it’s also odd they text you but don’t call you if they have your mobile number .
Why are they calling you , do you know ?, and obviously you are at liberty to call BT back .
