A native English speaker would never make the first mistake. The second one is poor grammar, but it could just be sloppy English typing. I make typos sometimes or change my thoughts mid sentence. This person isn't a native English speaker.

As they stand, the sentences are grammatically incorrect. So you are correct on that point. As to whether they are native English speakers or not, who knows, and does it really matter one way or the other? I have heard non native English speakers use the English Language masterfully because they have learnt the language well, and conversely, I have also heard "interesting" grammatical constructions from "native English speakers" - the assumption that the "natives" are necessarily superior in their "native language" is probably generally true, but not necessarily specifically true all the time. Referring to the 2 sentences, having fun with it, for the sake of argument, they could be hypothetically reconstructed (maybe in the speaker's mind, who knows, right?) - You want to learn English. Aren't you? (Aren't you the one that wants to learn English?) - I am a callcenter agent for 7 years now. ( I am a call center agent, (have been) for 7 years now). Add the comma, and this sentence could be a reasonable English sentence, no? have fun with English!

They are indeed both incorrect and they sound foreign to me. The first sentence could be an absent-minded error by a native speaker: if you change it to "You're wanting to learn English, aren't you?" it makes sense. In its current form it would have to be "You want to learn English, don't you?". The second one is definitely not an error a native speaker would make unless they were bilingual French or Spanish or something like that. It's "I have been a call centre agent for 7 years".

Hello Camilo, both sentence there is correct is some ways . At least you could understand the meanings . But it depends on situation and what questions . Im not native also and sometimes really dumb with my grammars .