Coworker gave me an attitude after I refused to take a call during my 1hr unpaid lunch break

This is just a vent.

I don’t my lunch everyday at 1pm. It’s been like this since I started this job a year ago. Someone called our office at around 1:20pm. We do not have extensions so everyone receives a call and someone is expected to pick up in two rings. Anyways, my coworker takes it, and it turns out that it is a prospective customer that I had only recently been in contact with. I am in the kitchen cutting fruit as part of my lunch.

The second I walk back to my desk, with a plate of food in my hand, my coworker tells me who it is, then, get this, asks if I can take the. I tell him kindly I am on my lunch break and I will return the call after I’m done. He doubles down, I repeat the same thing, then he gives me an “….uh, okay?” With an annoyed tone in his voice. He then proceeds to tell my prospective customer on the phone to that I don’t remember them, to send an email to me “to jog my memory” then saying I will get back to them once I return.

I was annoyed because I am very respectful of my colleagues time. If someone calls our office needing one of my colleagues and I see them eating lunch or having the door closed I will tell the other person to either call back or ask if I can pass a message. The fact I don’t receive the same respect is irritating.

I’m debating whether to report this to HR because this is a highly liked tenured colleague. In any case I have been very close to quitting this week without caring about having a job lined up or not. I did have a phone screening which led to me getting through to the next stage which is an in person 1hr interview, so I’m hoping that goes somewhere and I will jump ship.