The worst treatment

I was interview by 2 companies under smollan pepsico and Unilever got bought the position i choose pepsico that is closer to my house they told me to give notice at work and resign so I did. On Wednesday 28 August 2024 I was supposed to start at pnp as a merchandiser. The manager of pepsico could not load me up to the system saying that Unilever already loaded me up so I have to wait 6 months to be able to get off the system. But Unilever manager said they never received my things. Now I am unemployed after smollan ask me on JOBJACK if there is any other income in my house and I told them no. So smollan is creating unemployed. Which is very unfair and I need answers. I did send emails but still no reply