My landline will not ring out anymore when it receives an incoming call. All other functions are working fine. We receive calls fine and there’s no problem with the line when on the phone it just doesn’t make a noise when someone rings it but it screen lights up blue and the answer machine kicks in properly. I even bought a new telephone set thinking the telephone had broken but it has done the same thing with a new set. I tried to ring on 150 from the landline but I know the lines are busy at the moment and would like the landline fixing if possible as my Nanna is self isolating and I need her to be able to get through to me for when she needs shopping.