Trai — recharge related problem

I have recharged my number with rs.399 which is a vodafone number. But instead of adding it as main balance they are giving me flex balance which is nothing but farce. I repeatedly contacted via email with vodafone customer service. But they are constantly diverting the matter. They simply refused to give the money as main balance. They are giving flex balance which can be checked by one number which can't be accessed.
I fear that this is simply a kind of robbery.
As a simple customer vodafone are cheating with me.
Please take necessary action.