Vodafone India — sudden change of plan

I am using vodafone network for the past 6-7 years and was on prepaid plan for the previous 5-51/2 yrs and changed to postpaid after a marketing group visited our office and offered certain plans for govt. Officials. Also i availed one more no. Though i had not opted for any internet plan i was provided internet and charged exorbitantly for it. Then i visited the vodafone store and requested for basic call plan for my 2 nos. And basic net plan for 1 no. They suggested some plan at rs. 249/ - for net plan and rs.99/- for basic call plan and said that i have to pay 249/- plus taxes for 3 months and then it would come to 99/- plus taxes but after 3 months when i visited the store for change in plan they said that the request has been made and will be considered within 3-4 days but nothing happened and next month again i visited the store to set it right. Now suddenly rs. 249/- plan has changed to rs. 499/ and as per store people its 6 months since i am in 249/ plan and hence it has changed to 499/-. I did not get any intimation regarding change of plan and the store people said that these plans are at store level and hence no intimation. When other networks are offering unlimited calls and data pack for rs.250-300/- i am being charged exorbitantly for being with vodafone. It is daylight robbery and the store people are also not approachable in this regard. Should i be visiting the store every month to ensure that i am in the right plan, i am in my limit o[censored]sage and i am not being provided certain facilities with out my knowledge and charged for it citing my ignorance. I feel that i have been cheated royally for being loyal to the network. Plans convenient for the network applies on its own andwe will be billed accordingly while for those convenient for us have to be begged for at the store. Once billed it has to be cleared no matter whatever might be the discrepancy and it can be set right only in the next billing cycle and not in the current or previous bills