which shuttle bus do i get to the bund broadway manisons from Pudong airport?

No direct shuttle bus can take you there. You can choose shuttle bus line 6 to Laoximen Staion, which is around 3.5km from Broadway Mansion. Therefore, upon arrival at Laoximen, you can take a taxi to the mansion within about 10min.

Do you mean Maglev train? If so, you can take it at the airport to Longyang Road. Then you can transfer to subway line 2 to East Nanjing Road. Then a taxi can take to the mansion very fast.