two words: confinement and schedule.
Try getting a baby gate and keeping the pup in a specific small area, part of the kitchen for example. Put down piddle pads. Feed and water on a strict schedule. early morning feed puppy and allow water, pick up all uneaten food and water. ten minutes later take puppy outside and just wait for mother nature to take it's course. When puppy relieves itself outside Praise Praise Praise. Afterwards puppy may have the run of the living room or family room for 1/2 hour. Then back to the kitchen to a blanket for a nap. Food and water two hours later,pick up food and water wait 10 min, take puppy out, potty, praise, praise, play, nap. food, potty, play, nap. that is your life for a week or so. Keep puppy confined to small area, even at night until it is asking to go out. Stay on schedule.