Please define "completely new species", and "different genetic code" as you are using them in this sentence.
Depending on your choices for those terms, the answer is either a) there *have* been documented instances, or b) you're asking for too much in too short a time -- like asking why we haven't seen any new mountain ranges arise in the past 200 years, if plate tectonics is correct.
Not once has that happened.
See above. The amount of species change one could reasonably expect to see within 200 years HAS been observed, many times.
Color variations within the same species has been documented,
...and much more...
but genetic alteration to the point of declaring a new species. NEVER.
Again, as long as you're not going to insist on gigantic amounts of accumulated change, new species *HAVE* been observed to arise. See for example: Observed Instances of Speciation and Some More Observed Speciation Events
And if you're willing to relax your "200 years" window a bit, in the past few thousand years "completely new" species of animals and plants have arisen under human observation, including for example domestic dogs from grey wolves (and while they're still canids, dogs are *not* still wolves), new species of foodplants from their ancestral species (many of which most people would never imagine were related -- modern corn is descended from a grass-like plant, for example), and so on.
My personal thoughts on this aside, how can anyone lend credence to calling evolution fact when the theory cannot be proved even in a controlled lab environment?
Actually, countless aspects of evolutionary theory *have* been "proven in a controlled lab environment", countless times. Who lied to you and told you that it hadn't been?
Furthermore, there are vast numbers of observations and evidences which confirm evolution outside "the lab". Whoever told you that the only "real" scientific verification can occur in a "lab" was misleading you on that point as well.
A simple question:
Since ET says that monkeys and apes and Humans descended from a common ancestor,
did the CA have an opposable thumb for a big toe and the Humans devolved it;
or did he NOT have an opposable thumb for a big toe and the monkeys and apes EVOLVED it?