Tiscali have excelled themselves... they just don't want me to leave!

Got HD today.  Yay!  Just waiting on the broadband...

...a letter dropped through my letterbox about that a short while ago.  It was from Sky and it was about my broadband.  Excellent - the wheels are in motion... or, um, not.

Sky wanted my MAC (migration code).  They can't go ahead with the service until I give it to them.  Um, I gave it to them last week when I ordered online.  Oh well, I thought, I'll just ring them up and give it to them again...

The code is wrong, it's useless, it doesn't work!  Great, so that was 7 minutes and about 70p (IIRC, no time to fact check) wasted.  But the worst thing is yet to come...

How the hell am I going to get the correct MAC when I'm dealing with Tiscali?  That's going to be fun.  I'm going to get stonewalled all the way.  It'll probably take dozens of phone calls, hours of time and lots of patience.  And what's the guessing they'll keep giving me the wrong one or refuse to give me one (saying that the one I already have works)?

Fun, fun, fun.