After hours of calls to BT, engineer no-shows, complaints raised and multiple promises, nothing has happened

I am desperate to help my 80-year-old dad, JF, and his partner who have been left without a landline for more than two months by BT.

This is especially difficult as my dad has relatives in Canada that he usually phones every weekend, and his partner is Japanese. Both need a landline to call their families so as to not feel  isolated.