Hi everyone,
sorry for my late response. I took a closer look on the mirror and it seems i destroyed it. Furtunately I didnt damaged the part that attaches the mirror to the door, so it should be easy to fix. It seems all I have to do is to change the whole mirror and the socket. I have seen that the mirrors are dirt cheap on eBay, so I would making a fuzz with fixing the old one. I already tried to glue or tape it so it would be fixed for a short period, but it really didnt help. Thanks so far for your help, it showed me that fixing the mirror is no rocket science