Elena, sorry but "the order the order" is not very euphonic. At least a comma is in order. Also, "is not being tracked" means that you're depending on others to track and they're not doing it.

Uly, I think others don't track it and it is not reflected in the system, that's why I used " Is not being tracked". My doubt was if I should use Present Perfect after "since". I think it is not obligatory, right?

In that case, you should use the perfect because (1) you mentioned a starting point; and (2) the situation is still in effect: Since I placed the order, it HASN'T been tracked. Remember, this type of scenario is the essence of the perfect tense.

As you know, SINCE has two meanings. In the example above it means с тех пор and requires a simple past form to set a starting point in the past. "Since I came to this country, I haven't met a single American." If you were to use the present perfect, the meaning of SINCE would change to так как: Since I've been studying Russian, my girlfriend bought me a dictionary. Does that make sense?

*SINCE can also take a verb in -ing, as in your example, which is actually not quite correct. The reason is that if you use an -ing form, you need to mention the AGENT, i.e. the person who performs the action: "Since learning Russian, MY BROTHER has translated several articles." In your sentence, there is no outward agent, which is how you ended up with your repetition of "the order" (that shows that you're thinking in English!). So perhaps the solution would be to turn the sentence around: Since placing the order, I haven't been able to track it. (Here "I" is the agent). You might argue (and correctly so) that the second instance of "the order" IS the subject - and in a way it is. But the subject of a passive sentence is not an AGENT (in strict linguistic terms), it is the PATIENT, because there is still an contextual agent performing an action on it.

I know that must be so confusing, so here's a little article to explain THEMATIC ROLES in English grammar. Let me know if you have any questions :)

https://en.wikipedia.org/wiki/Patient_(grammar)

Thank you, Uly. I thought that perhaps I should have used Present Prefect. I need to digest your grammar lesson :)

You're very welcome. It's a lot to take in, but it's an interesting aspect of grammar :)