I'm on a Broadband and iTalk plan with Slingshot. Wondering if others are having same problem as me.

1. Line unclear and breakage in voice
2. Unable to connect to some phone numbers.
3. On some phone numbers it takes more then a minute after dialling the number.

I've raised this with Slingshot several times and spent hours with the technical support but they were unable to help out. They suggested that I download their softphone but could not help me to confiner it. Their last comment was classic one - "its the problem with your computer that your iTalk is not working."

Wondering if anyone else had the same problem and what steps were followed to resolve it.
Any help would be much appreciated, else I would have to change my broadband provider which would be a pain.

Cheers.