Yes Bank — check clearance issue

Address: Gurgaon, fortune global arcade,sikanderpur, mehrauli gurgaon road, gurgaon haryana 122 002, 122002

I have been trying to use checks of post office savings bank of india with this bank three times. However, the clearance department is having it returned saying that such account does not exist. This happened in the gurgaon, haryana branch.
If you notice that the "post office savings bank" is older than the independence of india and is functional in india since the british era in india, but the bank claims that neither such a bank exists anywhere in india or the world and also that i have created original checks and am trying to use it in the bank to get money into it.
From where will i get any money if no such bank or account exists? Am i crazy to do such antics? What benefit will it do to me to first create original checks, passbooks, transactions of atleast 30 years and even more and then present in a bank which is not even half the age of my account in the post office savings bank.
This time they cleared that they had been presenting my check of post office savings bank at state bank of india. For this reason its being rejected and returned saying "no such account exists".
Obviously this would happen. If you take a check from allahabad bank to get clearance from punjab national bank, same would happen.
So, yes bank is trying to get my check cleared at a third party bank altogether. Not once, three times they have done this to my checks. I am glad that they are not charging me any penalty for this matter atleast. Had they done that, i would have filed an fir instead against the bank.
When i asked the bank why they are doing this, they claim no idea or clue of it whatsoever. The bank employees claim that they are not even being aware of any such bank in the name of "post office savings bank" in the entire world. They claimed that they will still email the concerned department for an explanation and have it resolved, but i doubt that they would do anything since i have no update and its nearly 10 days now. I think they have done absolutely nothing.
This is total harassment to the customer as well as embarrassment to me and my family.
They either need to get updated with the types of banks and financial institutions operating in india from atleast more that 150 years. Have they employed total # or uneducated staff in their organizations who are not even trying to research rather trying to claim that the customer is a fraud. The employees in the rishikesh branch had my checks returned twice for the same reason. They had also misbehaved with us offensively asking us to prove in writing my relationship with my wife and daughter before they would open our account. Their sales department is a hopeless one.
Kindly have this matter escalated to the highest level so that they reconsider who to keep employed and who to upgrade in their trainings so that they dont cause problems to their customers and insult them outrightly.