Ola Battery replacement scam

I'm facing issue with the battery. They said that the battery got deep discharge and they are telling me that I have to replace it with a new battery which cost around 60-70k. After some chit chat they told me that we can bear 50% cost of battery and you have to give 50%. I agreed to that so they did some paper work on which they wrote 50% and then wrote the amount which is 20,000. Exactly the day after tomorrow which is today they reached out to me via call " your ola scooter is ready we had one battery already on our centre you can come and take your scooter" and also one guy from the service centre told me that ola battery cost just dropped down 2 days ago. Also I noticed that when we were doing the paper work one guy from the service centre was confirming 50%? really? customer agreed? and the other guy nodded him. I feel like they just repaired the battery somehow or they are replacing it with the old battery and asking 20k for nothing. Feels like a scam to me.