Reliance Communications — international roaming

Currently am abroad. I would like to receive incoming sms for my reliance indian mobile number. Some of the providers do this with free of charge. But reliance charges 150 rs per month. I tried to reach whether i could un-register the international roaming anytime after sometime. Since in the website, they mention its better to retain the international roaming & they didn't mention anything for un-register this service. I tried to call all the numbers given for customer service, it is not working. I don't think their customer service email also works, since i tried to mail them as well.