Regarding BT customer service their non UK call centres are truly appalling, we had an intermittent broadband and the call handler accused us having too many devices connected. Got so fed up with their lies I emailed the CEO of BT – CEOemail is your friend. What a difference that made, engineer at the house and an Executive Customer Care Team (based in Newcastle) on the case giving me updates on what they had done and what they were doing – everything now resolved
Sadly we live in a rural area so are pretty much restricted to BT