I had rotors, pads, and calipers replaced

I had rotors, pads, and calipers replaced. System was bled. Now the pedal goes to the floor. The car stops but I have to pump the pedal a few times. The master cylinder was replaced. Still same problem. He wants to replace the booster next. I think the problem miight be in the abs system. So far it has cost me a lot of money. I have a civic manual but it is hard to understand. I read on the internet the problem could be the abs master pump. Could you help me out?