RBL Bank — excess charges in rbl credit card bill

Myself narender sharma using rbl credit card [protected]. I am facing excess charges from last two months.
I am complaining about the bill generated having the amount which was added since feb'19 against purchase of mobile from flipcart and i cancelled it on the same day. But bank didn't adjust it and remain billing me with emi in march'19.
My complain registered and they give me a number 07179285.
Again in april billing, the same is added in bill without emi (Total amount 8500). I again complain about it and again they (Mr ganesh from rbl) give me complain number 07722353. And assure that it will resolve in 4 working days.
Kindly recheck and adjust my all credits which i have already paid and resend me correct bill before amount due date 07.05.19.