Citibank — Credit Card membership fee charged despite annual spends more than waiver condition.

I have been charged rs 1000 plus rs 180 gst as Membership fee for CC. I was told by their executive that my membership fee would be waived off if I spend more than rs30, 000. I have spent around Rs.54000 in the 12 months cycle they are referring to, infact in the month of September alone I paid bill of Rs.27000. But their liar executive told me I haven't spent more than Rs. 25000. Whereas in August itself their executive told me I had already surpassed Rs.30, 000 spending so won't be charged. But now I have recieved this charge. And despite calling their customer care, which told me it will be reversed, I recieved no communication of the same. And their contact us portal in service requests can't be accessed to view existing requests. The reference number Customer Care ex Vinodhini gave me was 7785.