Your credit score is dropping because you stopped making payments to your creditors. That's by design. It's not a bug in the system or a mistake by the settlement company. It's the expected outcome of how settlement programs work.
Here's what's happening step by step.
Missed payments are the biggest factor. Payment history makes up 35% of your FICO score. When you stop paying your creditors (which most settlement programs require), each missed payment gets reported to the credit bureaus. One missed payment can drop your score 50 to 100 points. After 3 to 6 months of missed payments across multiple accounts, your score can fall 150 to 200 points or more from where you started.
Utilization spikes: If you're no longer making payments, your balances are growing from interest and fees while your credit limits stay the same (or get reduced by the card issuer). Your credit utilization ratio goes up, which hurts your score further. Utilization accounts for about 30% of your FICO score.
Account status changes: After 180 days of non-payment, most creditors charge off the account. A charge-off on your credit report is one of the most damaging marks possible. It stays on your report for 7 years from the date of the first missed payment.
Collection accounts: Some creditors sell the debt to a collection agency after charge-off. That creates a new negative entry on your credit report. Even though the original account is already showing as charged off, the new collection account adds another hit.
Is this normal? Yes. Most people in settlement programs see their scores drop to the 450 to 550 range during the program. If your score was 680 before you started, expect it to be somewhere around 500 by the midpoint of the program.
The recovery: Once debts are settled and showing as "settled" or "paid settled" on your credit report, recovery begins. Most people see meaningful improvement within 12 to 18 months after completing the program. Within 2 to 3 years, many rebuild into the mid-600s. Full recovery to where you were before takes 3 to 5 years on average.
If you weren't told your score would drop, your settlement company didn't do a good job of setting expectations. But the drop itself is completely normal for the process.