You seriously can't tell? Scam. Plain and simple.
I would go into detail and point out most of the obvious reasons as to why it is, but I'm leaving with my family for lunch right now. So, maybe later...
Just like with geek squad....you'll be wasting your money if you hire a "professional". Just do some google searches and obtain the needed knowledge to DIY.
Yep, calling someone to clean it is just silly....dump some shock in...get the pump running...vacuum and skim it....get some of those chlorine tablet thingies and put 'em in....pool should be nice and blue again in a couple of days.