Flip Kart Bajaj Company - Received a damage product via online service

I had ordered Bajaj ** Lts OTG and received it on **th July. When opened, I found it to be an useless product without a guarantee card, damaged body and no accessories and with poor packing. Within ** minutes, I called the Flip cart team, send them photos and they asked us to register to return. They said due to lock down, the vehicle will come to collect on **th July. We were receiving spam calls and messages. When enquired, they said that those are automated messages which should be ignored. On **st July , we got n automated message to reenstate the return request. When I asked the agent, he asked us to ignore this automated message and the delay to collect is due to lockdown. I felt this was a genuine reason and so was waiting til **th July. Moreover we didn't respond to these automated messages. But after which, they say that the return request is cancelled on **st July with the reason "sellers policy is over". I feel they cheated me and tried to contact them. I get many agents online daily to repeat the same story that they cannot do anything inspite of me sending all the emails and the messages which I received from them and the pics of the damaged product. Finally they agreed to collect it on *th August. But when I called on *th August, the story they said that it will be resolved on *th August. I have all their recorded messages and calls. I hope you will be able to help me with the refund.