Is it free after !! pm. Review on SatyamOnline Dial Up

When I purchased the satyam online dial up connection the offer was that its free after 11 pm on weekdays and and on sundays. But when I cheked my account after two weeks I was surprised to see that every time I logged on 12 minutes are deducted from my total hours irrespective of the duratin of use. This 12 minutes deduction was made even if I logged on after 11 pm or on sudays. When contacted with the customer care service , they informed that this deduction iscalled port charges. But Vsnl or any other ISP as far as I know dont extract this so called port charge from the customers whenever they log on. For a 100 hours connection vsnl charges only 540 rupees whereas I had to pay 999 rupees for a similar connection of Satyam online. The customer support of satyam is so keen in reminding you when your connection expires. Many people still depend on satyam for internet connction because of their unawareness about the lower dial up charges of vsnl.