Prestige/Icon/Heirloom skin challenge not working

My Wattson icon skin challenge doesn't work, I have stage two of it but its stuck on 0 damage out of 100k meaning I can't get my third stage and the finisher. I did the damage in wild card because it was tracking and after I got tier two the challenge bugged out. This is all back when I first got the skin almost 2 months ago when the anniversary event was out. I bought that whole event for the shards and the skin doesn't even work. If wildcard buggs out the challenge then why is it even tracking damage in the first place. Can you fix my skin you just give me my last tier and my finisher, I've done well over 250k+ damage since acquiring that skin. I'm on Xbox btw with my gamertag AntarcticGnu7.