I know your pain, I did everything you said! I managed to get out of both my Three phone and broadband contracts without paying the early termination fee, and I had to haggle them to get this! It’s unbelievable how awful their customer service is, and as you say, how they can’t acknowledge the fault and keep saying how there is no problem. I’m now on Virgin fibre broadband and GiffGaff phone contract, both huge upgrades from Three, I’d recommend leaving and doing the same.
