If the airport worked before the service, then it can be claimed to be their fault. However, there are a couple of things to check.. Do you see any bars in the menu bar airport icon?
If not, do you see grey lines or a white box. The first means that the airport card is being seen, the second means that it's turned off.
You can also look at your system profile report to see if your computer is seeing the airport module. Go to the Apple menu, select "About this Mac", and then "More Information".
You'll see a listing of your computer's resources. Have a look in the network section, and see what the listing says about your airport module..
Best Regards
David