Just how many is multiple prongs?
Try and manually straighten the pins. If you can not then the MB is good only for a doorstop. If one breaks and the rest are straight the situation is still the same (Fubar).
Trying to RMA it will probably not work as the seller will take one look at the socket and determine it was buyer error. But that might be your only option.
New sockets can not be soldered on.