The bank emails your e-statement to you directly by default each month. Please check your mailbox / spam folder. 

If you want to access /download your bank statement by yourself, then please login and / register on SBM netbanking portal using your SBM customer ID, where you will find your e-statements.

SBM Netbanking registration link for new users: https://retail.sbmbank.co.in/mfmbs/ib/newRegistration.jsp

SBM Netbanking login link for those who have already registered: https://retail.sbmbank.co.in/mfmbs/ib/login.jsp