Att hooked up our internet and phone

Today ATT hooked up our internet and phone. they booked the tv hookup for saturday. Every time I would log into world of warcraft it would knock the router off line. I called ATT support line and the guy there tells me that WOW has to many files it is transfering and that the only way to play is that I have to lower the wireless down to wireless B. He then goes on to explain to me how wireless B is the same as wireless N and how only file sharers want wireless N. I told him that this was not acceptable and I got a 'too bad so sad' attitude from him. I went to bestbuy and We bought a linksys and tried to get it hooked up to the dsl. It would connect to the internet but it kept highjacking my IE window. It was worse then a virus. After about 2 hours on the phone with the Linksys people the woman told me it was the dsl causing her router software to highjack my IE. Seems these people have no idea what to do to problem solve. At like 3 am I was so mad I made ken call at&t and dish network and cancell everything. Cable will be by on tuesday to hook up the internet and cable. Then the following tuesday to hook up phone since they have to get permission from At&t to get the number ported over.