After years of painfully slow service and horrendo...

After years of painfully slow service and horrendous download speeds i moved 6 months ago and have called several times to cancel as my parents have changed to telstra but i am repeatedly being billed $50 a month! That is now $300!!! And i don't have hours a day to continually call them when they won't provide any help. Thank god my debit card expires in 2 weeks.