Instruct: Classify Amazon reviews into positive or negative sentiment
Query: NOT Compatible with Phone that even Panasonic said was

I purchased the KX-TG5776S phone system, and the Panasonic WEB Site shows this (TCA200) as an accessory (10-10-2006) BUT IT DOES NOT FIT THIS PHONE. I called the Panasonic help and they told me I got the wrong thing that the TCA200 did fit that phone and that I should order it directly from Panasonic. So like an idiot I did, and voila, its the same part, still doesn't fit. Called Panasonic again, this time the person said they don't make a battery backup for the KX-TG5776S yet and that the "other" Panasonic person was mistaken. Now I'm out over $20.00 bucks in shipping costs and still don't have a phone that works when the power goes out. Its quite possible the TCA200 works, but just not with the Phone system I purchased.