+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
Probably not, depending upon what kind of open permit it is
 
You can apply to extend a BOWP if your permanent residence application is still undecided. This application "will be considered on a case-by-case basis" (http://www.cic.gc.ca/english/resources/manuals/bulletins/2013/ob485A.asp).