Since I am on PS4, I cannot use console commands, which means I can't continue to the final Thieves' Guild quest (Under New Management). No matter how many quests I do for Vex and Delvin, he won't give me the special jobs. I have looked eveywhere, but everything is suggesting I use console commands, which I don't have access to. I don't want to give up the questline (he gave me one special job which was the Windhelm one), but now he won't give me any more.
How can I get Delvin to give me more special jobs so that I can finish the Thieves' Guild questline?