I tried to send a complain email and I couldn't fi...

I tried to send a complain email and I couldn't find any proper email address. ..
I found only interactive email web pages, where you have no evidence of what you sent, no history, sometimes no attachment option .

I received an answer which blamed Cargus (but is not their fault) with no investigation from DHL side, to see what was happening and why they did mistakes..
The DHL's Deutsche employee wrote in computer less than half of my postal address.
In this case, how can I receive my parcel?

It is a real shame.
Is not the single company who has no Complain Email address, which clearly express that they don't really care about Private Clients problems/opinions.