Lame duck architect not helping me finish my project design to get final my project.

[Victor G.]

I hired an architect who design my garage conversion/adu. He does this work on the side of his actual W2 architectural firm job.  The drawings were completed and submitted and approved. I have approved permitted plans in hand. I started the project and am about 90% completed with the construction.  My city inspector says that I do not have enough electrical capacity on my electrical panel; therefore I have to add a gas line.  This will trigger a revision to my Title 24 calculations.  I have no problems with this and would gladly accept the change.

I brought it up to my architect 6 months ago. I have messaged my architect but hasn't communicated with me in months. I 've tried texting, calling and emails.  I got one message in 3 months stating that he's been too busy with his w2 job. This has been delaying the completion of my project for 6 months now.  

I don't know what to do next.

Isn't the architect the designer of record the only one to do this revision?  I've asked him if I can help him, pay him, or refer me to another architect to no avail. I get crickets in return. 

 I was told to send him a certified letter in the mail for 72hr response otherwise it would be a breach of contract.

Should I go visit him at his w2 firm and ask him in person?  Should I take him to small claims court?

Please advise.