Hit a dog accidentally!

On 23 January while on my way to the office a dog suddenly came in my way and I accidentally hit him. Nothing happened to me my bike went airborne and landed somehow. The dog ran and fell down on the other side of the road. This shook me and I went to check up on the dog I had no idea what to do in this situation. Called some of my friends and asked their help they told me some hospitals and vets. I rushed home and took a bed-sheet to pick the dog up and got in to the rapido pet auto. When I reached there the dog was not there and he was running around. Then some people who lives on the road site(in one of those cemented houses that they make in blr duting a house construction) came and said it is their dog and asked what happened i sadi i accidentally hit him and let's take him to the vet Then i took hum to the vet got him checked up the doc said ever looks fine just look for internal bleeding and gave some medications i paid for all that and then gave the kid who sadi his family owns the dog some money to buy chicken for him. Next day the guy calls and ask for money for food which i gave him then again he called ain the evening for more money which i also gave. Then next day he calls and sadi give me more money to which i sadi i will get the food(chicken) deliverd to your house and did it then next day the guy called and said give me 1500 and I will take Care of the dog and leave you. I gave him 1500 rs and told him to send the gos video eating food and all. Now next day he calls me and asked for 2500 and said the dog will die and they will come for me blah blah and he is taking the dog to his village so I argued a bit but then gave the money to him (i was just thinking the poor dog should not die . That dog looked at me in the hospital that day in such a sad helpless way) then he calls again and said 2500 more as the dog is very badly hurt and the doc is asking for that much money to which i said stop lying and all but after a while i gave the money as the guy actually looked like he cares about his dog and i felt responsible for it. Then he calls me again and said just 3k more rupees and the dog will be completely fine to which i got angry and asked him to stop calling me this went on for a while but again i gave the 3k so in total 8k plus all the food I bought and the hospital bill for the first day in total I have spent 10k now. Now today morning he called me and said the doc sadi that dog is fine and he will be okay. Then he said (bhaiya apni khushi se kuch paisa dedo) meaning now he is just asking money for himself and i got angry and stopped picking up his calls. Now in the evening he called me again and said give 500 rs for food for the dog to which i said the dog is okay please feed him whatever you used to feed him before all this happened and then we argued a bit and i cut the call. Now he is kinda scaring me saying i know your photo i have your number i will go tell police. So i said please go to the police and let them take care of this(to which he kinda stuttered and said why, i am guessing he lied a lot in these 2-3 days and just wanted money from me) now if he really cares about the dog and did everything he said i told him please go put one FIR on me as I already called my bike insurance company and the guy told me to do so(they said on the basis on the calculations the company will reimburse the money to the owners). Now what can I do, I really want this to be over It was not my fault the dog came in front of me accidentally the owners didn't have a leash on him. Have you guys ever faced something like this? What steps should i take now. It feels like being a good hearted person is the worst thing today if it was someone else that day they would have left the dog to die there but to me it just felt morally wrong and i could not leave the poor puppy to die.