Yes, you can get your account back even after the deactivation. The first thing you should do is to correct the background report. Regarding the fact that it wasn’t made by DoorDash but by a third-party company, you should find out who is the provider and dispute with them the information. I had almost the same situation, but I was working for Lyft, not for Doordash. Then I started to look for a consumer law lawyer near me. I’m very grateful to the one I found because he gave me huge support during the process. The dispute wasn’t enough in my case, we had to sue the background check company.