Hi and Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work I am sorry that you are having such a bad time - and are still being hassled by these people
Now that you are in the Support Group you do not have to undertake
any Work Related Activities.
When you feel better you can decide to volunteer for something
if you want to. If you do this you need to be careful as activities that started off as voluntary can then become compulsory!