State Bank Of India [SBI] — Cheque clearance

Address:

Thane, Maharashtra, 421306

I have deposited cheque in the bank on 13th of october and now its been 6 days now my cheque has not yet got cleared and when i go for asking about the reasons or details the staff just neglect the matter and say that go and check in mumbai branch, as this unvalid its bank's responsibilty to take actions and work in dept for customers. i am very much disappointed by the service.
Waiting for the action to be taken