Rana Motors — non deposit of refund amount in bank account

I had booked a maruti swift dlx car on 23rd may 2017 through the agent namely jha of rana motors gurugram through cpc by a booking amount of rs. 5000/- vide canara bank cheque no 900536 dtd 25 may 2017. Now due to non receipt of rates for cpc after gst, i had visited showroom on 15th july and cancelled my car booking. They told me that your refund will be deposited to your bank account. Refund cheque received in showroom on 21 july 2018 but not yet deposited in my account till date inspite of my repeated requests