frustrations with “Wait!”

Hi, I’m new! Typical scenario I need help with: My 11 yr old son will be upstairs just around the corner OR in a side room beside the kitchen. Either I realize he needs to do something like dishes or picking up his things while I’m in the kitchen or I have just been talking to him but after we finish he is sidetracked and leaves me. So then when I think of these things, or maybe need to tell him something more, I call for him, but then he yells, “Wait!” This has happened so often that I am triggered by that word. His reasons for “wait” vary from being into a book or game, to needing to grab something from upstairs, to not coming down for supper because he’s just not ready or is in the bathroom for 20 minutes or more! I’m tired of being on “his” timeframe and being delayed in my parenting teaching time, and having delays with everything! I typically get upset and either tell him to hurry or not to talk to me that way, but with just starting to learn the TSG method I am getting myself more calm. He, on the other hand, is struggling to be calm and patient. What do I do about it? Is there a way he can tell me what he needs/wants more appropriately and without yelling Wait?! I’m not sure how to instruct him on it, and what behaviors I need to change in myself.

I realize he shouldn’t be directing my evening but it sure feels like he is!