Anyways, to speed things up i did send them a part of my documents which show the purchase of over 30 Bitcoin.
But sure enough, my funds are still blocked!
Sorry to hear man. This is very important. Did they not accept your documents as valid and gave you a reason why they didn't, or have they still not responded to you? If the latter, give them some more time.
I'm not sure to what extent they outsource their verification and research department, but investigations mostly take a while so I wouldn't expect immediate results as in them releasing your funds.
What I have seen services do is that as long as your usage patterns in terms of value are relatively stable over a longer period of time, but suddenly you go well beyond that with a transaction, they might get triggered to step in.