First, as noted in a comment, none of this is grammatical. The "to" after "wanted" is simply wrong in these sentences.
Second, even with the "to" removed, the wording is potentially confusing. What is literally being said is that "we" wanted that coaching center. I greatly doubt that what is intended is our physical possession or legal ownership of that center. Instead, what is almost certainly intended is that we wanted Rahim's admission into that specific center. A clearer way to say that is
As we wanted, Rahim is being admitted to that coaching center
Third, the use of the present progressive may be appropriate as may the use of the present perfect or the future. It depends on the situation and intended meaning. We start with the difference in meaning between "admit" and "attend."
He has been admitted to Yale
is approrpriate if the sense to be conveyed is that Yale accepted him as a student in the recent past without reference to whether he has yet started attending or has even started to complete the procedures required by that acceptance.
He will be admitted to Yale
is appropriate if the sense to be conveyed is either that it is certain or almost certain that Yale will give permission for him to attend or that Yale has given permission for him to attend after certain procedures have been completed.
He is being admitted to Yale
is appropriate if the sense to be conveyed is that Yale has given permission for him to attend subject to his doing certain things that are not yet complete.
The point here is that tenses may convey subtle differences in situation and attitude. They are not defined by a legalistic pedant's obsession with a physical clock. The present progressive is appropriate when what is intended to be conveyed focuses on a process that has or is just about to start but has not yet been completed. If that is not the focus, then another tense is appropriate.