Breadcrumb i hope it isnt a talk talk engineer,someone who will faff around try to connect a laptop, put a test phone in your socket and insist its a noisy line, by letting u listen to harmless ,open line background conditions.and then pass it to openreach ,who find no line noise because there is none there,and find your extn wiring is shaged.which tt engineer who wouldve had a weeks training missed.i see it a few times a week.
Also openreach charge your SP not you, alot of the SP stick admin charges in Addition,and can be tripple wot openreach charge