Karnataka Bank — mental harassment

I have my OD account in Shalimar bagh Delhi branch, OD 158.
Although branch manager is cooperative but we are very much harressed at overseas branch.
We are sanctioned with flat 750 inr on our foreign remittance but despite hundreds of reminders we are charged 3000 to 4000 per transaction for last 3 years, this makes over one lacs which is charged forcefully.
Every time we have to ask many many times for Swift copy but we kept waiting for 2 to 3 days every time.
Everytime we have to cross a hard test while collecting documents.
Your inexperienced staff always demand unnecessary documents as hard copy which is now a past thing in these days.
We feel that we have committed a crime by opening account in your bank.
We have stopped our foreign trade from your bank and soon we will close our account because of this mental harressment. Kindly refund our all unnecessary charges which you have charged for last 3 years.
Regards
Sanjay Bansal
S N METALLOYS
OD ACCOUNT 158
SHALIMAR BAGH BRANCH
DELHI.