ICICI Bank — Salary a/c charges

DEAR SIR/MADAM, I am writing this mail regarding complaint against unfare charges of ICICI bank. As I left a job in 1 months duration with official formalities. From that employer have ope salary a/c to ICICI bank as it is mendatory to join that company. Now ICICI bank executive phoned me and ask me either Pay Rs 500 or keep balance 10, 000. I have already saving a/c in HDFC, AXIS and SBI so y should i keep a/c in ICICI. Now my question is y should i pay this charges like this if I join different companies & they open salary a/c to bank. then I have to pay everytime Rs. 500 or keep balance 10000. Is it fare rule? I am requesting you please look in to this matter & give me positive reply on it. Regards JVALIN