Original post by: Dan ,
Sorry to say you'll need to go back to the servicer and complain again (try talking with the owner). I would recommend you down load the IFIXIT guide [guide|6024|MacBook Pro 13" Unibody Mid 2010 AirPort Card Replacement] within it you can see how they replaced the lid assembly and you can note the AirPort card (WiFi card) as well as its antenna are located within the lid assembly. You can see in Step 17 and below the access to the AirPort card under the clutch cover. There is no way they can blame this on you as they replaced the full assembly (you paid for it!) as such the unit was defective! Either they need to replace the AirPort card or give you back your money.