like everyone said above, if your plan doesnt exist anymore, and most likely isn't, the rep may or may not be able to keep the plan. so just brace yourself to pick out a power pack family plan. in the long run, it may be the same price or cheaper to keep that main line depending on what your plan currently is and what it may change to.
used to work for sprint. now i just torment them. here to help and judge your posts