South Bengal State Transport Corporation [SBSTC] — Cancellation of bus without intimation

With due respect I want to tell you that I am Saikat Acharjee from Durgapur No- [protected].Today I booked a ticket from Karunamoyee to Durgapur at 4.15pm in A/C.After that I arrived at the stand in scheduled time.After the scheduled the bus was not coming and re check the ticket the it is shown that the bus was cancelled.
please tell me why the bus cancelled without any intimation??No call no messages were received for the cause.I want the answer.
I want the money refund.

Please look into the matter and do the needful for the refund process as soon as possible.Tickets attached herewith for your reference.