Terrible feedback and extremely unstable wireless

<p>I have a 6mbit wireless internet line with Snowball in the Somerset West area. I have email, phoned them so many times to come and sort out their unstable line. I have spoken to so many technicians at Snowball but the don't come back to me as they have promised.</p> <p>The line is so unstable that at times at barely get 0.23mbit. That is 25 times less.</p>