Travelyaari.com — Not able to cancel ticket

I booked bus ticket using travelyaari.com on 27th may 2020 for 1st june 2020 from chandigarh to gurugram. But on the day when i was supposed to depart from chandigarh, travellers agency informed that bus will not go to gurugram because administration have not provided the permission. Hence i tried to cancell my ticket by using ticket cancellation process in travelyaari.com but, ticket was not cancelled. I also tried travelyaari's customer care no. But those no. Are also not working.
So now how can i cancel my ticket if not cancelled then will sue notice from legal department for further action.