Cox webmail login sending me to another site

Did finally get a reply from the German company OX Software, whose login page we keep getting sent to, but they obviously did not read my email, since their reply asks me for a "Product Maintenance or Support Key, which you have received after the purchase of the product or you have bought" -- as if I am their client, not Cox. I reiterated the issue & added that multiple people on this forum are reporting the same problem. Told them I did not need to hear back from them, just need them to FIX IT.