I hope that's the end of it for you... certainly wasn't for me though. Don't hold your breath. They keep sending me bills even though they have multiple notes in their systems that I canceled last summer and I was actually issued a refund for unused service. Go figure.
Amazingly, my billing actually got fixed AFTER the merger, something I was unable to get XM to do before the merger. Originally, I had 4 radios on my account. Got rid of some cars, etc, and so I gave 2 of the radios to my parents. They signed up their own account, activated the radios, and everything was good..... except for the part where XM kept trying to make ME pay for the radios, even though my dad had already paid for 1 year of service on HIS account. And, the two radios they wanted me to pay for didn't show up as active on my account. But somehow it had generated a bill for me, and they wanted me to pay it.
I actually just paid the $83 or whatever it is for my wife's radio for the next year, and mine comes up in another month or so, and I'll probably pay for another year on it as well..... We don't listen to anything else, and if satellite radio meets an untimely demise, we'll be on the bandwagon until the bitter end.