I keep doing quests and not getting payed for them

Today I did multiple deliveries between 4 and 11 PM in my city in areas where a $4 per trip quest was active and didn't get credited for any of them. I'm so frustrated - I get paid for these quests and sometimes I don't. It's extremely random. I've contacted support about this twice now, and both times they just said "wait for the payment to process" (???) - but that's not how it works. If I get credited for a quest it happens as soon as the order is complete. If I don't get credited for one, it never updates.

They also ask for "proof of the promotion," which is absurd. First of all I'm not screenshotting my phone every time I get an offer while driving. Secondly, I'm absolutely certain they can tell when/where a promotion was active. I got escalated at one point, and the support rep admitted I should have been paid for a quest - but once again stated "wait for payment to process".

Does anyone have any experience with this? What should I do? By my calculations I've lost out on at least 36 dollars because of this. I feel like this is lawsuit material (promising compensation and then not providing it).