Where can we get their Email id ???Try emailing them and get them in writing, If they provide pppoe username then I think.you can do online payment on the portal, but I'll guess that they won't provide it. The plans are too costly imo, check if you have any other isp available in your area. And generally the plans mentioned on the website are old one's but in your case its opposite.
okayIts mentioned in contact us page on their site.