[Resolved]  Vodafone — for changing the bonus card

hello,
i took the bonus card of RS. 33 which reduced my STD rates all over india to 75 paise per minute. For this RS. 33 are deducted from my balance every month. now, i want to change my bonus plan to RS. 119 which will allow me to do all STD calls at 50 paise. So, please what should i do to change my plan. i called the vodafone care 4-5 times but haven't got much help there. so please do reply

Regards

Siddharth Kr. Singh