I think it's just a glitch in their software or/and server. That's my guess but I just got paid so I'm fine. I think they have a support ticket, check on that first. Also contact your AM and they should be able to fix the situation, sometimes offers go down on advertiser's end and they can be slow to let the network know of the offer going down.
I just try my blamads content lockers and I don't have any problem with that
I haven't received my June Payment on BlamAds up until now, I've talked to my AM on Skype he said I have already on the urgent list payment and he asked me to wait and be patient and I will get the payment asap. But it's been long time ago till I forgot about it. I suggest you guys to leave this network asap.