2 Wire Router Randomly Disconnects

i am a gamer and i rely on the internet to do some buisiness as well, a few months ago my router started randomly dropping me from my connection and then 10 seconds later the connection is back up. now i know alot about computers and cant figure out why this is happening. it seems that the problem starts with skype. when i play some games while in skype(we use it as a communication device for the games) i will get dropped from skype and from my game, then skype reconects and i can reconect to the game but 5 minutes later it happens again. i have at&t and am using a 2701HG-B, my donwload speed is a max of 3mbps and usualy is around 2.7mbps. i have contacted at&t multiple times, i have reset my router multiple times but it hasnt fixed the problem. at&t stated that i am demanding too much bandwith from my connection. i feel that this info totally crap. when im on with just 1 of my many devices at 3am and all i am doing is playing a game and talking on skype and it disconnects, there is no way i am demanding too much.