construction is over. contract states that I pay $100,000 and when construction is completed I will pay $3000 per month till $24,000 more is paid off. contractor is not honoring his contract. april I began payment - not $3000, but paid $5000 which included my stimulus check and social security. Recently paid another $7000. he claims I need to pay the remainder now. I am a senior citizen and cannot afford that at this time and he is not abiding by his contract. he already has a lien on my property and 90 days is coming up for him to act with an attorney. already received a demand letter from his atty and when I tried to call his atty. no response. what do i do now?