I need to get an update for some high priority items, which have been pending for months now and starting to get absolutley critical. The technical team of 2 are the only colleagues who can help me. The problem is they are clearly overstretched and focusing on other work with more revenue. Whilst I have escalated the issue to my boss at least once, they still completely ignore me.
I have had a face to face chat, picked the most important items, emailed and offered to talk over a call. My boss thinks the problem is I don't talk to them as often face to face. In my opinion, they can be quite rude and if they are already busy, then I don't want to disrupt their productivity by intruding at their desk. They are well aware of the risks with not sorting these items.
My question is what other approach could I try to get a response. Is it too unprofessional of me to refuse to own these actions after some point?