100% i would say your installer not enough knowledge on....
1. to find Azimuth +Elevation
2. parameter such as FREQ + pol + s/r wrong input
I am using a CHINA wok with stand 1.5 metres for AS3s...not problem.
Thaicom...some strong transponder...also not a problem.
Measat C-band can receive too.
How about if you DIY your dish yourself....I think you can do it.