Have had lots of problems with wifi - in a four-room flat! Have been trying to get it resolved for some time. Sent boosters ..they do not work in a flat with limited access to electric sockets - and cable to link to router was too short. Following texts where I was told you could fix things at your end the service is worse. Can't use my mobile phone in my study nor laptop. Was promised a dongle to arrive today ...instead I get two more boosters!! Dongle please - and can you also restore the wifi to what it was before fixing at your end monday??