hi job_seeker
thank you for ur answer and suggestion; yeah, i have tried both, no results until now; for the processing times it should be max max 28 business days which passed long time ago
for the case specific inquiry i did it online multiple times; just once i got an answer that "a letter was sent via email on...."; when i wrote back telling them that we have never received any email and what can we do next, how can we know the content of those email, we got no more reply; each time we write them back with the same question we are waiting 10 more business days for an answer, we don't get anything and we send again...

Possible scenarios:
1. Your application got lost in the mail or misplaced in the CHC office, in which case you can cancel the first one and then send them a new application. Did you send your application via the postal system with tracking numbers? Courier? (I hope the passport was not submitted with the lost documents =if app got lost= which very unlikely because it is one of the documents needed, sad)
2. CHC has made a decision and have sent/will send the decision and it just has not reached you yet.
3. CHC has sent a decision and it has gotten lost in the mail, sent to the wrong address.
They do not actually answer emails (never got one when I sent the CIC officer query emails before) because it is such an unusually looooonnnnnnggggg time to process visitor's visa (6 weeks is already a long time, how much more the 6 months waiting time for you)