I just activated XM in a new GMC and also in a second car, nadda on the scooter. No problems so far with these two services.
You can try these avenues if you really get the run-around from the outsourced, script reading dingleberry heads:
"you may communicate with any of our outside directors as a group or individually by sending an e-mail to nonmgmtdirectors@sirius-radio.com. You may also write to any of the outside directors in c/o Patrick L. Donnelly, Executive Vice President, General Counsel and Secretary at Sirius XM Radio Inc., 1221 Avenue of the Americas, New York, New York 10020. If your question or concern is related to products, service or your SIRIUS XM Radio account, please email our Customer Care team at customercare@sirius-radio.com or call at 1.888.539.SIRIUS (7474)."
There's also the Atty Gen of your individual state and or District Atty office, etc.
Go get them.