Agent help with visa extension renewal

[burlap]

I'm a 68 yr old American with health problem. I've been i Bangkok 12 years now, I'm basically on self quarantine, waiting for a vaccination.  But I have a problem: in July I'll need to renew my retirement extension at Chaeng Wattanna.  This terrifies me.  Waiting for hours on end indoors with thousands of others, sometimes in tight lines - almost nobody following social distancing rules.

 

On the other hand, I don't want to overstay, and have to leave the country to get a new visa because travelling alone is very difficult for me because of health issues.

 

My question: Is it possible to hire an agent to go CW and get my extension without me actually having to be there?