Three call centre staff
@nick
It's when attempting to leave or change my tariff that I've had problems with them (or more specifically when the were desperately trying to extract every last penny they could). They are 9 parts salesman to 1 part customer support and have spent an inordinate amount of time trying to sell me things I didn't want or need, and have resorted to outright lies in doing so.
When I canceled, the guy tried to convince me a should pay £8/month for an emergency spare phone (yeah, £8/month for emergencies) with 3 after I told him I'd already signed up with a new provider AND already had a spare PAYG SIM for emergencies.
When I'd previously tried to change my price plan in March the guy tried his best to convince me I needed to sign up to a new 18 month contract because my minimum period hadn't expired. When I asked what date my original contract expired on, it turned out it was the very next day and I could change tariffs in 24 hours without committing to anything.
And from mildly misleading to outright deceptive, when trying to convince me to sign up for a broadband contract a CS guy straight out lied to me and told me that I couldn't use my phone for tethered broadband despite my N95 being quite capable of HSDPA, and the fact that I had a 3Gb broadband add-on (one specifically meant for using the phone as a modem).