RBL Bank — bill of rs 1838.71/- for what and why

Address:	Surat, Gujarat, 395010
Website:	bill Of Rs 1838.71/- for what and why

Dear sir,
Myself vicky narendra singh and i have credit card of rbl bank i got before two month ago. I have issue and use card at amazon.in for shopping and amount of rs 3649 /- and installment of three months of rs 1243, but i got sms on my phone that your credit card bill of rs 1837.71 with due date 02/05/2018 has been sent and will reach you in next 7 day i got this sms, but what kind of this bill amount i pay for what, and why and i sent you screenshot also please rply me. Thanking you sir.