in a round get 11 kils as 2 different classes that is the description of this wildcard.

while in persuit of a 100% completion it looks like an easy one but sadly i can't unlock it even after a month. i tried out different ways to unlock it like foer example switching kits and use those for killing instead but even though i completed one round with +20 kills done by using different kits i found i still havn't received this card.

can someone here point me to the right direction of how this one must be done?

I have ~9000 kills and don't have this one yet

Pretty sure it means you have to get 11+ kills as 2 different kits, like 11 as Demolition and another 11 as Assault. Getting 22 kills in a single round can be tricky enough, let alone keeping count of what kit you've used.