Datalink Infotype — datalink infotype are threatening me need help...

I am with u... have also experienced the same with DATALINK INFOTYPE... They are cheaters even after completing work they dont pay u n ask out penalty money frm u... But its a request dont pay... its illegal company... They did not pay wen we complete work efficiently n after submitting they wil not accept your workn wil ask for penalties n send u legal notices... They are threatening me now...
I NEED HELP...