After moving apartments I was not able to use my DSL services for 6 months (there's no phone outlets in my apartment). This was confirmed by the technician who came to the apartment. After that I called repeatedly (it's impossible to talk to someone who can do something about anything), sent a letter asking to cancel immediately, called a few more times, and even though the contract was finally cancelled, that happened 6 months after, and I got charged for those 6 months. Then, to make matters worse I got charged 50 for "moving fees", even though the service was never moved.
(I just noticed this forum is about Mobile. Mods, please either move or delete, and I'll create it on the DSL board)
Edit o2_Sven: Moved from English o2 Community: Mobile