Bad Nutec building Solution

I'm so disgusted with this company. Came forward seeming to know what they doing but we landed up in such an incredible mess. We need a nutec home builder. We were quoted R82000 which he stated was a complete 3 bedroom little home for myself and 3 kids. The structure went up in 3 days. He received all his money (paid in 3 parts) and left. What we sitting with is a home that needed to be skeemed and painted. Floors and ceiling uneven. Loose boards, plastic door handles, shoddy electrical work, the list goes on and on. Even our foundation is a sand foundation which is falling apart. To say I'm disgusted is seriously the sweetest term I can use because I feel like ****ing this man for *****ing the little we had.