I have taken Matrix sim of Rs99/- rental( though I insisted for prepaid sim) .No internet plan, Next day, they will send me change in Plan email. and if you do not accept or reject they taken it as accepted. Matrix is a Cheat company.
They are prohibitively expensive and above all do not disclose all the details about the charges. It is always better to buy a local SIM card in the country where you are travelling. It is very easy and simple.Their billing system is a complete fraud. Beware one and all, do not deal with this company.