Quoting Mr's&Family*:" You do realize that most of these elective, pay out of pocket ultrasound places, the "techs" aren't even ... [snip!] ... showed baby balls (the start of his baby balls). Maybe wait until your anatomy scan around 20 weeks and ask about gender."
I waited until my anatomy scan. And did the elective at 32-33 weeks. And went to a friend I knew had gone to school for it. But this is true. She said the same thing when explaining why her office was where it was (It wasn't a medical building she's sponsored through a company as an independent contractor). She said the actual places/companies are full of untrained 'techs' who work the machine but don't have a full knowledge of what to look for or look at. They take pictures is basically the training they got.
Sorry it seems like you got ripped off. I always got crappy pics though even with my OB's tech Baby girl is stubborn. Lol. I had to take still frames from the video to get a few good shots like the ones on my profile. It sucks but wait until anatomy scan then you can be sure, like before you buy anything etc., I definitely wouldn't trust that place.