I used
https://www.google.com and entered the words
sewing machine repair singer new york city
There were too many to list all, Many have five star reviews, but unable to determine which repair singer one machines. You could call them when they are open on the phone numbers shown.
City Sewing Machine Corp ( Service Center )
254 W 35th St, New York, NY 10001
Hours:
Closed ? Opens 9AM Mon
Phone:
(212) 302-4500
City Sewing Machine Corp II ( Showroom )
Address: 300 W 38th St, New York, NY 10018
Hours:
Closed ? Opens 9AM Mon
Phone:
(212) 268-0409
Sewmark Sewing Machine Corporation
Address: 359 W 36th St, New York, NY 10018
Hours:
Closed ? Opens 8:30AM Mon
Phone:
(212) 239-5150
Fox Sewing Machines Inc
5.0
Address: 359 W 36th St, New York, NY 10018
Hours:
Closed ? Opens 8:30AM Mon
Phone:
(212) 594-2438
Jado Sewing Machine Inc
Address: 40-08 22nd St, Long Island City, NY 11101
Hours:
Closed ? Opens 8:30AM Mon
Phone:
(718) 784-2314
Ronis Brothers Sewing Machines
Address: 220 W 38th St, New York, NY 10018
Phone:
(212) 575-2679