Airtel — my international roaming pack is not working

Address:

600054

[protected]
This is my airtel prepaid number. I have put international roaming pack for singapore on13th sept. But when i reached singapore you have deducted 99 as usage charge for data. That pack is suppose to provide free data and international call to india from singapore. Since my sim is prepaid international roaming should be activated already. Please explain me the reason and give me my money back. This is the last time am trying to get answer from you. Or my entire family will switch to some other network.