AITA for not thanking a friend for getting me a job interview?

I(22F) went to see my ex coworker David(28M) at the coffee shop we used to work at together, and he called some people to get me a job interview. We were talking about how I’m looking for a job in another cafe and didn’t know where to start, so he helped. He scheduled me a job interview. I thanked him then for even calling those people for me, even if nothing came of it.

I ended up getting the job and wanted to go to the cafe David works at to thank him in person and buy him a drink. However my schedule was a bit crazy for the first 2 weeks and I couldn’t make it, so I ended up texting him near the end of week 2 to thank him.

He sent a voice message replying “I know, I’ve known since the day you started. I remember thinking wow you couldn’t even say thank you after I got you the job, but yeah. I’ve known the whole time”. It was kind of dramatic, but I understood so I texted back and explained I wanted to come in person to say thank you and discuss earlier but just couldn’t make it.

I said thank you again and asked when he was working so I can come and buy him the drink anyway, and if not this week then the following one. But to that he just replied “Yeah yeah come next week. Just make sure it’s all good for you”. Which also came off kinda ironic on his part, but I just said I will try to make it this week.

Since he never told me when he actually works I came by that week anyway but he wasn’t there, so I told his coworkers to tell him I was looking for him. A few days later (today) I texted again asking when he is working, but he is ignoring me for about 6 hours now.

So my question is, AITA for not texting immediately the day I started or is he blowing this out of proportion?