septic tanks backing up

[Gp G.]

septic tanks backing up and sewer water going to crawl space. I spoke to many septic contractors every one saying different story and different prices to repair starting from 2k to 40k. I am totally confused. Some say my soil report not that good and need to involve county as well. To just pump both tanks costing 1000$. How to trust which contracting company does decent job at reasonable price with unknown unseen issues like septic tanks around Atlanta area. How to stop sewer water going into crawl space which is smelling bad which is major problem. Thanks in advance.