Municipal Corporation Of Greater Mumbai — Online payment problem to BMC

I have submitted complaint for my refund amount against payment done for marriage certificate which is get deducted from my account twice but show unsuccessful from BMC side. If there is no response from any one will take it to consumer court.. Because this is ridiculous after taking follow up with BMC on mail also they are taking things lightly I m asking them when can I expect my refund they are not writing a single word to me.