First mistake was no signed contract or down payment, All the satellite companies, want full payment up front, on a credit card, before they come to install, if a big company wants payment up front, why would you work without payment?

In my state as a corporation we need to have an attorney take the case to court, so we need to pay attorney fees, and we can't lean in our state without filing an intent to lean first before starting the job. Check with your state laws.

Collection agent is fine, as long as you have a signed contract, collectiom agency will get the most back, but you do need the signed contract for them to proceed.