State Bank Of India [SBI] — cheque dishonour issue

Address: New Delhi, Delhi, 110001

Please help in getting this resolve as i am having account in state bank of india which was formerly known as state bank of mysore from the last 30 years.in this period i had presented almost more than 500 cheques.
But now after this merger of state bank of mysore and state bank of india.
My 5 cheques got dishonoured and i had been charged rs 590 for each check whereas i was having sufficient amount in my saving bank account.
I visited to sbi branch but they are not giving any satisfactory answer or reason of cheques getting dishonoured, they are saying to contact service branch for reason but service branch is not giving any information after several attempts.
I had sent complaint by sms also by writing unhappy but no response came.
I am a govt employee with salary account on same branch.
Due to dishonouring of cheques i got financial loss of rs 2950 and also given penalty to the party where i had given the cheques. Apart from financial loss i am going through social and mental embarassment also as where i submitted the cheque they are thinking that i am not having balance in my account.

Please help in getting this resolve asap or please suggest where to complaint further for reiumbursement of this amount with compensation.

Harish chandra
Mob no - [protected]
Email id - [protected]@gmail.com
Bank name - state bank of india
Branch - connaught palace
Branch code - 40278
Account number - [protected]
Account type - saving account.