Welcome to this customer to customer forum.
Which one of these matches your master phone socket?
or or or
Is there any noise on your phone calls? Dial 17070 and select option 2, there should be no noise between the announcements.
Where is the BT Home hub plugged in?
It is the forth picture (up and under) I did the test and on this occasion it was quite but generally it sounds like waves crashing and very crackly.
You need to report a line fault, no mention of broadband. Once the line issue is resolved then your internet should be OK.