Okay, I've been down this road a couple of times. Both with high-end audio gear. A Nak Dragon and a Sony 777 ES SACD player. Both needed alignment. Two separate techs, two separate brick-&-mortar businesses. 20-years apart between fixes..
Month passed, no fix. My calls were always answered with "we need to order parts from Japan" --or-- "I'm just fine tuning the unit." Or some such nonsense.
After six months, I called --- no answer from both businesses. They both went out of business, and I never got the equipment back. With no forwarding or anything. Drive to the businesses, both are now new businesses. The new ppl have no idea what happened to the old business or owners. I'm left digging through business licenses and all that civic crap.
If I were you, I'd get my equipment back, while you can. Worry about fixing or selling once you get it out of this tech's hands.
Nowadays, I will try to fix the darn things myself. Tube equipment is no problems. I will try to tackle complex solid-state or just get rid of the offender and buy a new replacement.
I'll tell you --- sending my old JBL speakers out to have them reconed, or new surrounds, and tested made me sweat big time. I went down and talked to the owner/tech Bao (Speaker Repair Pros, in Orange County) and checked out his setup --- before handing over the speakers. There just isn't a whole lot of long-time reputable techs doing this kinda stuff anymore. I was very satisfied with his work and especially his level of expertise. Communication was the best part. We'd spend a couple of hours talking about JBLs in famous guitar amps, for famous studios.
Anyhow, good luck!