I'm interested in these refunds to advertisers. I've never received a refund, but if accounts are being banned constantly, some with tens of thousands of dollar

I'm interested in these refunds to advertisers. I've never received a refund, but if accounts are being banned constantly, some with tens of thousands of dollars, then it should have been noticed, especially since most of the time I hit my daily spend, then move onto the next day, you cannot just make that up 2 months later. Retroactive activities must take place.