RBL Bank — change in address

Hello

I have trying to change my mailing address with rbl and they seems like they do not accept registered rent agreements, and i needed a chq book urgently to be delivered. The branch told me that they would get the chq book to the branch and this has been going on since over a week. These guys are just not bothered in regards to the urgency and as per rbi what i have read off a registered rent agreement can be accepted as a legal address proof.