How to check the reason for a lifetime ban?

I have incorporated 2 companies back in Ras Al Khaimah in early 2018.

One of the companies was more active till now and all the renewal fees are paid on time, while the other company was never used since we decided that the first one is actually enough to operate our business.

Today, I applied for a tourist visa to Dubai and got a rejection with the message "lifetime ban". I have no idea what the reason can be; no clue, no case ID. Is there any way I can check it and proceed accordingly?

Thanks!