sounds like the "installer" didnt know about setting polar HH arc. so you dont want him back as he cant fix it and will probably cost you more money.Best thing now is to learn how to do it yourself.most new motors come with some instructions,read and re-read. I use the SG-2100 motors to move my Triax 110 cm dish and my Patriot 90 cm dishes.I will do my best to explain for you.
1. Make sure pole is PERFECT verticle from all sides,mount in concrete if possible.
2. Center the motors travel,mine has button on bottom for this.
3. mount motor and dish on pole with lnb arm pointing at due south satellite (use compas)
4. set elevation to find satellite, rock up-down - left-right SLIGHTLY to peak signal.Once maximum signal is found tighten adjustment screws.
5. do not change ELEVATION once it has been set for due south satellite.
6. check satellites west and east to see if it is tracking ok, DO NOT CHANGE ELEVATION again until you fully understand how this all works.
7. If you cant do this,read and read and read, I would not trust anyone else messing with MY motors, you must learn ,thats the fun of it !