Credit Guard Inc. Don't trust this company Internet

I was trying to buy a home but my credit score was 570 and I needed 620. I called Credit Guard Inc.and explained my problem. The salesperson I talked to Evan Ford told me they would raise my score at least 100 points. I paid $1500.00 ahead of time. After six months of paying down my credit cards and paying small debts on my credit I got my credit score. It was up to 580. I called them and reminded them what they promised. I was told to read my contract. It doesn't promise any such thing. I asked for my money back and they refused. I am raising a grandchild on my social security so this was a chunk of my savings. I do not think anyone should trust this company.