Does not connect Facebook

As I reported a long time ago, it does not connect me on Facebook, because I am connected with Google. For this reason I cannot obtain the legendary quest card, please give me the card that is not my fault. Thank you.
Mi id

Hi there! I’m writing you because I’ve finished all missions in the monthly event but one (login with Facebook), and my account is already logged, so I really dont know where could be the problem. Please, can you give me the legendary card? Thanks in advance.