Thank you for waiting and sorry it took a while to get back to you!
I'm unsure how much has changed since you wrote us here, but I'll still try and provide you with some information.
Have you received a Duldung now? By "activity", do you mean work?
1. First of all, if you want to apply for work, this thread from our platform may help to answer your question:
I have Duldung - how can I get back my Arbeitserlaubnis (work permit)?
As Thorgen mentions in his answer, the Ausländerbehörde has to consent any job that you want to do/ is generally responsible for issuing you a working permit.
Here is some information by Flüchtlingsrat Leverkusen on working permits with a Duldung: http://www.fluechtlingsrat-leverkusen.de/eng/3.2.1_arb_duldungen.htm
2. I'm sorry to hear you didn't receive any help!
Regarding receiving social benefits, I found this explanation from Flüchtlingsrat Leverkusen: http://www.fluechtlingsrat-leverkusen.de/eng/3.1.1_soz_duldungen.htm
I hope this information helps. I'll have a look at your other questions as well and will answer your question regarding marriage on the other thread!
All the best,