Landlord not issuing rent receipt & not accepting rent

I have a shop at Howrah in West Bengal. I have been paying rent on time since the last 17 years. Now the land lord did not issue Rent receipt for last two months ( i.e July 19, Aug '19) in spite of receiving rent in cash. On 3rd oct 19 - while i went to give rent for the month of Sept 19 and ask the L.L to deliver the rent receipts , she refuses for both of them. I , on 3rd Oct19, mailed a request to accet the rent and issue the rent receipt for the said months. As no reply , again on 18th Oct 19, i mailed , vide registered post, to give me a BANK DETAILS, so that i can send the RENT in that. As no reply- on , 24th oct 19, i mailed the Rent of Sept 19 vide Registered Post.But it was again refused by L.L. What should i do now?? Should i deposite the rent in RENT CONTROLLER?? As approaching the Rent Contrller involves plenty of time, expenses- shoul i open a BANK AC , by informing the L.L, for depositing the RENT? Can the above arrangement able to defend me if the L.L suit an EVICTION suit?? Is there any risk for me?? Pls suggest.