Bank employees get commission on opening new accounts with new customer ID only, not with existing customers. So, based on that they'll say any number of things.. complain and it will be done, no issues.
Reminds me of an incident from 2021. My dad has been having an SBKIT zero balance savings account with LTF debit card and nil SMS charges for over 15 years. But that account was in a farther branch from home (Used to be the nearest one when we used to live in that area).
He contacted the nearest branch and showed interest in creating a few lakhs' FD and for transferring the account to their branch. A few days later, the Branch Manager and the Assistant Branch manager both visited our house. However,
instead of transferring the account to their branch, they insisted on creating a new joint account. (Back then I didn't know that the branch could be transferred online by yourself too.)
They opened a Silver savings account with a condition of either maintaining a ₹25,000 MAB or ₹1.20 Lakhs FD. They also put it into the Privilege Banking programme soon, which only made the IMPS charges free, but soon an issuance charge of ₹175 was charged for the debit card. The older account was never charged for the debit card though.
However, the problem started afterwards. For the new joint account, a new CIF was created for him wherein the name shows as "Full Name JT1" and new netbanking credentials were provided.
He could
no longer transact in his old account's Netbanking and mobile app, as the same mobile number was given for both. Later I transferred the old account's branch through netbanking to the same one and tried linking the new account to the old account's netbanking and also vice versa, but it failed in both cases. Eventually, had to give the new account another mobile number for the netbanking and mobile banking to work.
When my dad started to get frustrated with this, one year later, he closed the new account, and had to break the FD and create a new one from his old account.
From this incident alone, I've started to lose trust on ICICI Bank.
Also, in another incident, when I went to open an account for myself, they insisted on depositing ₹75000 as initial deposit. Eventually, had to create one in HDFC Bank and opened a Savings Max account and had to submit only ₹25K as initial deposit there. Even the debit card is free there and more rewarding than the one provided by ICICI.