Germany

I have graduated from a university in Germany and found a great job that matches my degree. With this work contract, I have applied for a residence permit for employment. My documents were accepted and I have received a Fiktionsbescheinigung (my student residence permit is no longer valid).

Today I was informed that my employer is facing bankruptcy and the majority of the employees, including me, were let go. I was also told that I am entitled for severance pay if I apply at the Arbeitsamt.

What does that mean for my residence permit? Will it still be processed to the end or is my application no longer valid? Should I apply for the severance pay? I understand that I need to look for a new job immediately, since I don't have any other "proof of being able to secure my livelihood". Is it best to call the ABH directly and tell them about the layoff or wait to get a residence permit?