Fc mobile's bug about error the league's owner

Have you tried deleting the league as the message says?

Because I gave him my ownership when he left and he was able to leave, even though I gave him my ownership and I became a member myself, and because it now shows me as a member, due to a bug, there is no option to delete the league for me, and there is only the option to leave the league for me, and whatever I do, it gives the same error and bug, but before, when I was the owner, there was an option to delete the league for me.

And that means even though I have to be a member because I had given my ownership to someone else and he shouldn't have been able to leave the league but he was able to leave even though I gave him my ownership .... I said even though I have to be a member and can leave and the league registered me as a simple member,  but even though it still recognizes me as the owner, it won't let me leave the league.