@Sandeep36
Firstly, from the information you've provided above, this was a host cancellation, so you should have been given the option of a voucher or a full cash refund to your original payment method.
Were you, at any point in the process, offered the option of a cash refund? If not, you're within your rights to go back to Airbnb and inform them that you're not accepting their voucher and request that the full amount you paid, be returned to your original payment method immediately.
The only exception to this would be if you'd also paid for this cancelled booking with a voucher you received from a previous cancellation. Is that the case?
Penelope