As Markjoy says, that is AOL's standard response which is probably high on the cue cards for the help line. Follow Markjoy's advice and plug the modem in with the supplied connection line rather than the extension move the computer if necessary. Then if you still get 2mb tell AOL.
Do not forget that the (presumably) "up to 8mb" is a maximum and you are not guaranteed that - it depends on many things including how many others are using your b/band from the exchange and your distance from same. I am on "1mb" and never get more than .8mb