(416) 628-5255 is a marketing list likely from Questrade.
They are probably selling the phone number of their customers and contacts without any consent.

got this call yesterday ..
didnt pick up.. left a voice mail saying debt n stuff deleted right after!

asking about 10,000 dollars in debt on my cell number that ticks me off.

Debt crisis? Really annoying.

Did a bit of searching and came up with 'GT GROUP TELECOM SERVICES CORPORATION' owns (416) 628-5255. which belong to if anyone is interested:
whois canadait.ca
Domain name:           canadait.ca
Domain status:         registered
Creation date:         2000/10/17
Expiry date:           2012/08/28
Updated date:          2011/08/17

Registrar:
   Name:              Webnames.ca Inc.
   Number:            70

Registrant:
   Name:              CanadaIT Limited

Administrative contact:
   Name:              Mr Peter Standeven
   Postal address:    CanadaIT
                      13065 - 19th Avenue
                      Surrey BC V4A 7S5 Canada
   Phone:             1 (604) 538-6015
   Fax:               1 (604) 538-6790
   Email:             peter @ canadait.com

Technical contact:
   Name:              Barry Wong
   Postal address:    Stargate Connections Inc.
                      6450 Roberts Street
                      Suite 347
                      Burnaby BC V5G 4E1 Canada
   Phone:             +1 (604) 606-8999
   Fax:               +1 (604) 606-8998
   Email:             tech @ starcon.com

Name servers:
   antares.starcon.com
   starrunner.starcon.com

Got the same telemarketing call on my cell that I do not give out unless necessary (to doctors offices etc.)  Reported it to the government do not call registry site:  
https://www.lnnte-dncl.gc.ca/index-eng